A125412 Number of base 24 circular n-digit numbers with adjacent digits differing by 6 or less.

1, 24, 270, 2502, 26954, 296054, 3328560, 37937308, 436881314, 5069330622, 59159457800, 693395951272, 8153975122508, 96126641420704, 1135380985915012, 13429583316289952, 159020854550064418

Offset

0,2

Comments

[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

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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))

Crossrefs

Sequence in context: A126904 A001413 A022065 * A270846 A187048 A000915

Adjacent sequences: A125409 A125410 A125411 * A125413 A125414 A125415

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved