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%I #5 Mar 31 2012 12:35:06
%S 1,32,212,1428,9676,65800,448524,3062596,20939104,143307908,981612296,
%T 6728277248,46143758054,316613006372,2173302900418,14923204166476,
%U 102502175850752,704231575697316,4839430076086740,33262613275263868
%N Number of base 32 n-digit numbers with adjacent digits differing by three or less.
%C [Empirical] a(base,n)=a(base-1,n)+7^(n-1) for base>=3n-2; a(base,n)=a(base-1,n)+7^(n-1)-2 when base=3n-3
%o (S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-2](($[i]`-$[i+1]`>3)+($[i+1]`-$[i]`>3))
%Y Cf. Base 32 differing by two or less A126419, one or less A126386.
%K nonn,base
%O 0,2
%A _R. H. Hardin_, Dec 27 2006
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