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 A125322 #9 Apr 30 2025 15:01:58
%S A125322 1,12,72,360,2080,12232,73656,449440,2770016,17195112,107304872,
%T A125322 672224048,4223186080,26586825472,167628931360,1058056409920,
%U A125322 6683674433920,42244783230496,267124015799712,1689602502335776
%N A125322 Number of base 12 circular n-digit numbers with adjacent digits differing by 3 or less.
%C A125322 [Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.int(n/2)+1
%H A125322 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 A125322 (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))
%K A125322 nonn,base
%O A125322 0,2
%A A125322 _R. H. Hardin_, Dec 28 2006