A125450 - OEIS

%I #8 Mar 31 2012 12:35:02

%S 1,15,183,2031,24907,309275,3863091,48336527,605167019,7578088593,

%T 94901326543,1188486366599,14883984640087,186399715293651,

%U 2334380328957769,29234663364972731,366120980626529371

%N Number of base 15 circular n-digit numbers with adjacent digits differing by 8 or less.

%C [Empirical] a(base,n)=a(base-1,n)+F(8) for base>=8.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n

%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))

%K nonn,base

%O 0,2

%A _R. H. Hardin_, Dec 28 2006