The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A143190

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

#7 by Bruno Berselli at Sun Oct 13 17:17:35 EDT 2013

STATUS

proposed

approved

#6 by Jon E. Schoenfield at Sun Oct 13 17:16:37 EDT 2013

STATUS

editing

proposed

#5 by Jon E. Schoenfield at Sun Oct 13 17:16:28 EDT 2013

AUTHOR

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

STATUS

approved

editing

#4 by D. S. McNeil at Thu Jan 06 08:19:24 EST 2011

STATUS

proposed

approved

#3 by D. S. McNeil at Thu Jan 06 08:19:21 EST 2011

COMMENTS

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

STATUS

approved

proposed

#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 succesive 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 and the operators +, -, *, /, using each number only once.

DATA

10, 29, 41, 43, 40, 44, 26, 21, 15, 15, 18, 18, 18, 10, 10, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5

OFFSET

1,1

COMMENTS

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

Asymptotically (in fact as soon as n>=15), the sequence tends to 5.

CROSSREFS

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

KEYWORD

nonn

AUTHOR

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

STATUS

approved