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%I
%S 1,26,214,1406,10814,84426,675262,5474306,44862014,370667774,
%T 3082741374,25775117966,216460107326,1824572346350,15427938607960,
%U 130804716210096,1111599418378734,9465652381274166,80745664149260704
%N Number of base 26 circular n-digit numbers with adjacent digits differing by 4 or less.
%C [Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.int(n/2)+1
%o (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 nonn,base
%O 0,2
%A _R. H. Hardin_, Dec 28 2006
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