A125458 Number of base 23 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 23, 319, 3767, 51151, 709643, 10047997, 143871219, 2074700383, 30047531747, 436316634759, 6345752320051, 92380289359093, 1345627928276083, 19607422887447847, 285762990007119467, 4165291580685012543

Offset

0,2

Comments

[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

Links

Table of n, a(n) for n=0..16.

Prog

(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))

Crossrefs

Sequence in context: A080188 A142433 A234234 * A329164 A329250 A022747

Adjacent sequences: A125455 A125456 A125457 * A125459 A125460 A125461

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved