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 A125349 #9 Apr 30 2025 15:12:00
%S A125349 1,12,88,552,3968,29112,218008,1650528,12582880,96324600,739228968,
%T A125349 5681576176,43706415776,336396570496,2589969578592,19944309195072,
%U A125349 153600126376320,1183021908352864,9111943178894368,70184192846874336
%N A125349 Number of base 12 circular n-digit numbers with adjacent digits differing by 4 or less.
%C A125349 [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
%H A125349 OEIS Wiki, <a href="/wiki/Number_of_base_k_circular_n-digit_numbers_with_adjacent_digits_differing_by_d_or_less">Number of base k circular n-digit numbers with adjacent digits differing by d or less</a>
%o A125349 (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))
%K A125349 nonn,base
%O A125349 0,2
%A A125349 _R. H. Hardin_, Dec 28 2006