The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A044250 Numbers n such that string 7,7 occurs in the base 8 representation of n but not of n-1. 1
 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..2000 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 *) CROSSREFS Sequence in context: A045064 A043450 A031491 * A044631 A045136 A031895 Adjacent sequences: A044247 A044248 A044249 * A044251 A044252 A044253 KEYWORD nonn,base AUTHOR Clark Kimberling STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 30 03:22 EDT 2024. Contains 372957 sequences. (Running on oeis4.)