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A125455 Number of base 20 circular n-digit numbers with adjacent digits differing by 8 or less. 0

%I

%S 1,20,268,3116,41308,559340,7702750,106934246,1491033780,20837241344,

%T 291544100378,4081622919042,57160810856050,800635091767934,

%U 11215210012054526,157108281806511326,2200900956018966740

%N Number of base 20 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

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Last modified May 26 04:39 EDT 2022. Contains 354074 sequences. (Running on oeis4.)