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%I A125424 #8 Mar 31 2012 12:35:02
%S A125424 1,12,124,1188,12356,129492,1361746,14331126,150856188,1588078260,
%T A125424 16718137334,175997231290,1852781990558,19504865161846,
%U A125424 205334357806520,2161624764528348,22756160755947020,239561861905201388
%N A125424 Number of base 12 circular n-digit numbers with adjacent digits differing by 7 or less.
%C A125424 [Empirical] a(base,n)=a(base-1,n)+F(7) for base>=7.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n
%o A125424 (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))
%K A125424 nonn,base
%O A125424 0,2
%A A125424 _R. H. Hardin_, Dec 28 2006

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