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 A125362 #9 Apr 30 2025 15:15:58
%S A125362 1,25,205,1345,10325,80475,642601,5201179,42555989,351057541,
%T A125362 2915011415,24333734747,204025109321,1716939536441,14493675325957,
%U A125362 122675396959965,1040712670097941,8846367126653991,75326437255237327
%N A125362 Number of base 25 circular n-digit numbers with adjacent digits differing by 4 or less.
%C A125362 [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
%H A125362 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 A125362 (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 A125362 nonn,base
%O A125362 0,2
%A A125362 _R. H. Hardin_, Dec 28 2006