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A125441
Number of base 29 circular n-digit numbers with adjacent digits differing by 7 or less.
0
1, 29, 379, 4061, 50667, 644449, 8391139, 110770129, 1477678507, 19866024191, 268674919979, 3650362311603, 49772506083411, 680521511221503, 9324474025969369, 127975744665648451, 1758688074252097435
OFFSET
0,2
COMMENTS
[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
PROG
(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))
CROSSREFS
Sequence in context: A281059 A010834 A022721 * A142756 A142327 A160298
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved