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 A125437 Number of base 25 circular n-digit numbers with adjacent digits differing by 7 or less. 0

%I #8 Mar 31 2012 12:35:02

%S 1,25,319,3385,41647,522925,6717127,87439069,1149386407,15213415573,

%T 202370895399,2701584846557,36157460122255,484806234281277,

%U 6508805756745191,87464954360562805,1176115987345565255

%N Number of base 25 circular n-digit numbers with adjacent digits differing by 7 or less.

%C [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 (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 nonn,base

%O 0,2

%A _R. H. Hardin_, Dec 28 2006

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Last modified December 2 21:06 EST 2023. Contains 367526 sequences. (Running on oeis4.)