The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A031487

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A031487

Numbers whose base-8 representation has the same number of 0's as 7's.
(history; published version)

#9 by Alois P. Heinz at Sun Jul 04 15:54:40 EDT 2021

STATUS

proposed

approved

#8 by Jon E. Schoenfield at Sun Jul 04 14:26:13 EDT 2021

STATUS

editing

proposed

#7 by Jon E. Schoenfield at Sun Jul 04 14:26:09 EDT 2021

NAME

n-th number k which in Numbers whose base -8 representation has the same number of 0's as 7's.

CROSSREFS

Cf. A007094.

KEYWORD

nonn,base

STATUS

approved

editing

#6 by Harvey P. Dale at Tue Dec 12 14:47:45 EST 2017

STATUS

editing

approved

#5 by Harvey P. Dale at Tue Dec 12 14:47:42 EST 2017

MATHEMATICA

Select[Range[100], DigitCount[#, 8, 0]==DigitCount[#, 8, 7]&] (* Harvey P. Dale, Dec 12 2017 *)

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 18:56:23 EDT 2012

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

Clark Kimberling

Discussion

Fri Mar 30

18:56

OEIS Server: https://oeis.org/edit/global/285

#3 by N. J. A. Sloane at Sat Sep 13 03:00:00 EDT 2003

KEYWORD

nonn,new

nonn

AUTHOR

Clark Kimberling, (ck6(AT)evansville.edu)

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

nth n-th number k which in base 8 has the same number of 0's as 7's.

KEYWORD

nonn,new

nonn

AUTHOR

Clark Kimberling, ck6@cedar.(AT)evansville.edu

#1 by N. J. A. Sloane at Sat Dec 11 03:00:00 EST 1999

NAME

nth number k which in base 8 has the same number of 0's as 7's.

DATA

1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 13, 14, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28, 29, 30, 33, 34, 35, 36, 37, 38, 41, 42, 43, 44, 45, 46, 49, 50, 51, 52, 53, 54, 56, 71, 73, 74, 75, 76, 77, 78, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 97

OFFSET

1,2

KEYWORD

nonn

AUTHOR

Clark Kimberling, ck6@cedar.evansville.edu

STATUS

approved