The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A044250 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A044250

Numbers n such that string 7,7 occurs in the base 8 representation of n but not of n-1.
(history; published version)

#10 by Joerg Arndt at Sun Feb 23 14:07:14 EST 2014

STATUS

proposed

approved

#9 by Vincenzo Librandi at Sun Feb 23 14:01:27 EST 2014

STATUS

editing

proposed

#8 by Vincenzo Librandi at Sun Feb 23 14:01:17 EST 2014

LINKS

Vincenzo Librandi, <a href="/A044250/b044250.txt">Table of n, a(n) for n = 1..2000</a>

STATUS

approved

editing

#7 by Harvey P. Dale at Sat Feb 22 13:10:19 EST 2014

STATUS

editing

approved

#6 by Harvey P. Dale at Sat Feb 22 13:10:14 EST 2014

MATHEMATICA

Select[Range[3000], MemberQ[Partition[IntegerDigits[#, 8], 2, 1], {7, 7}] && !MemberQ[Partition[IntegerDigits[#-1, 8], 2, 1], {7, 7}]&] (* Harvey P. Dale, Feb 22 2014 *)

STATUS

approved

editing

#5 by Russ Cox at Fri Mar 30 18:56:43 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

#4 by N. J. A. Sloane at Sat Jun 12 03:00:00 EDT 2004

NAME

String Numbers n such that string 7,7 occurs in the base 8 representation of n but not of n-1.

KEYWORD

nonn,base,new

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

KEYWORD

nonn,base,new

AUTHOR

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

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

NAME

String 7,7 occurs in the base 8 representation of n, but not of n-1.

KEYWORD

nonn,base,new

AUTHOR

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

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

NAME

String 7,7 occurs in the base 8 representation of n, but not of n-1.

DATA

63, 127, 191, 255, 319, 383, 447, 504, 575, 639, 703, 767, 831, 895, 959, 1016, 1087, 1151, 1215, 1279, 1343, 1407, 1471, 1528, 1599, 1663, 1727, 1791, 1855, 1919, 1983, 2040, 2111, 2175, 2239, 2303, 2367, 2431, 2495, 2552

OFFSET

1,1

KEYWORD

nonn,base

AUTHOR

Clark Kimberling, ck6@cedar.evansville.edu

STATUS

approved