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 A125363 #9 Apr 30 2025 15:16:17
%S A125363 1,26,214,1406,10814,84426,675262,5474306,44862014,370667774,
%T A125363 3082741374,25775117966,216460107326,1824572346350,15427938607960,
%U A125363 130804716210096,1111599418378734,9465652381274166,80745664149260704
%N A125363 Number of base 26 circular n-digit numbers with adjacent digits differing by 4 or less.
%C A125363 [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
%H A125363 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 A125363 (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 A125363 nonn,base
%O A125363 0,2
%A A125363 _R. H. Hardin_, Dec 28 2006