The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A143192

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a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.
(history; published version)

#9 by Jon E. Schoenfield at Sun Dec 25 01:00:26 EST 2016

STATUS

editing

approved

#8 by Jon E. Schoenfield at Sun Dec 25 01:00:14 EST 2016

LINKS

Gilles A. Fleury, <a href="/A143192/b143192.txt">Table of n, a(n) for n = 0..1500</a>

STATUS

approved

editing

#7 by Bruno Berselli at Sun Oct 13 17:47:34 EDT 2013

STATUS

proposed

approved

#6 by Jon E. Schoenfield at Sun Oct 13 17:14:57 EDT 2013

STATUS

editing

proposed

#5 by Jon E. Schoenfield at Sun Oct 13 17:14:53 EDT 2013

AUTHOR

_Gilles A. Fleury (gilles.fleury(AT)supelec.fr), _, Oct 18 2008, Mar 06 2009

STATUS

approved

editing

#4 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

Gilles A. Fleury, <a href="/A143192/b143192.txt">Table of n, a(n) for n=0..1500</a>

KEYWORD

nonn,new

nonn

#3 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

OFFSET

1,0,1

COMMENTS

Asymptotically the sequence tends to 66 67 (what is the first n for which a(n)=66 ? 67 is n<=10000 for sure... to be found !1042).

LINKS

Gilles A. Fleury, <a href="b143192.txt">Table of n, a(n) for n=0..1500</a>

KEYWORD

nonn,new

nonn

AUTHOR

Gilles A. Fleury (gilles.fleury(AT)supelec.fr), Oct 18 2008, Mar 06 2009

#2 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

COMMENTS

This sequence is related to the sequences A071110 (for 5 successive integers) and A060316 (for 6 successive integers), and others sequences to come...

KEYWORD

nonn,new

nonn

#1 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

NAME

a(n) is the smallest natural number we cannot obtain from n, n+1, n+2, n+3, n+4, n+5, n+6, n+7 and the operators +, -, *, /, using each number only once.

DATA

1413, 7187, 12421, 22751, 28862, 48046, 36094, 46372, 54214, 72845, 88119, 107246, 125589, 104153, 43838, 45893, 55054, 62090, 66226, 70187, 69638, 74941, 85303, 81913, 68891, 77237, 37997, 48758, 42827, 45554, 22217, 26617, 29422, 29099

OFFSET

1,1

COMMENTS

This sequence is related to the sequences A071110 (for 5 successive integers) and A060316 (for 6 successive integers), and others sequences to come...

Asymptotically the sequence tends to 66 (what is the first n for which a(n)=66 ? n<=10000 for sure... to be found !)

CROSSREFS

Cf. A071110, A060316, A071107, A060315, A141494, A142153.

KEYWORD

nonn

AUTHOR

Gilles A. Fleury (gilles.fleury(AT)supelec.fr), Oct 18 2008

STATUS

approved