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A125419 Number of base 31 circular n-digit numbers with adjacent digits differing by 6 or less. 0

%I

%S 1,31,361,3391,37237,416111,4761901,55250583,648017421,7662743017,

%T 91199048321,1091067528549,13108510159921,158042063686499,

%U 1910968040115173,23162642662833881,281323809804798781

%N Number of base 31 circular n-digit numbers with adjacent digits differing by 6 or less.

%C [Empirical] a(base,n)=a(base-1,n)+F(6) for base>=6.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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))

%K nonn,base

%O 0,2

%A _R. H. Hardin_, Dec 28 2006

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Last modified January 22 21:47 EST 2022. Contains 350504 sequences. (Running on oeis4.)