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 A125364 #9 Apr 30 2025 15:16:32
%S A125364 1,27,223,1467,11303,88377,707923,5747433,47168039,390278007,
%T A125364 3250471333,27216501185,228895105331,1932205156259,16362201900939,
%U A125364 138934036864707,1182486246555079,10084940483186669,86164966628165665
%N A125364 Number of base 27 circular n-digit numbers with adjacent digits differing by 4 or less.
%C A125364 [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
%H A125364 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 A125364 (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 A125364 nonn,base
%O A125364 0,2
%A A125364 _R. H. Hardin_, Dec 28 2006