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 A126553 #7 Mar 31 2012 12:35:06
%S A126553 1,32,322,3322,34572,361614,3794396,39900036,420199296,4429943806,
%T A126553 46737838878,493369276732,5210044608364,55033710005144,
%U A126553 581433527148552,6143714493591276,64923869760680486,686132382682831498
%N A126553 Number of base 32 n-digit numbers with adjacent digits differing by five or less.
%C A126553 [Empirical] a(base,n)=a(base-1,n)+11^(n-1) for base>=5n-4; a(base,n)=a(base-1,n)+11^(n-1)-2 when base=5n-5
%o A126553 (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>5)+($[i+1]`-$[i]`>5))
%Y A126553 Cf. Base 32 differing by four or less A126527, three or less A126500, two or less A126419, one or less A126386.
%K A126553 nonn,base
%O A126553 0,2
%A A126553 _R. H. Hardin_, Dec 28 2006