This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A292777 #9 Oct 08 2017 23:36:03 %S A292777 1,1,1,2,1,1,1,3,2,1,1,2,3,3,4,2,1,1,1,2,1,6,3,3,1,7,4,2,1,1,2,4,2,3, %T A292777 9,6,3,3,2,7,7,8,4,2,1,1,1,3,1,2,5,4,6,5,6,4,3,12,6,3,3,3,1 %N A292777 First differences of A100290. %H A292777 Robert Israel, <a href="/A292777/b292777.txt">Table of n, a(n) for n = 1..10000</a> %H A292777 Rémy Sigrist, <a href="/A100290/a100290.png">Scatterplot of the first 10000 terms of the first difference of A100290</a> %p A292777 filter:= n -> evalb(n mod (2^numboccur(1, convert(n, base, 2))-1) = 0): %p A292777 A100290:= select(filter, [$1..1000]): %p A292777 A100290[2..-1]-A100290[1..-2]; # _Robert Israel_, Oct 08 2017 %Y A292777 Cf. A100290. %K A292777 nonn %O A292777 1,4 %A A292777 _N. J. A. Sloane_, Oct 08 2017