A125418 Number of base 30 circular n-digit numbers with adjacent digits differing by 6 or less.

1, 30, 348, 3264, 35768, 398960, 4557138, 52777258, 617855120, 7292255532, 86621920558, 1034253538722, 12400539056222, 149190801475434, 1799997776606804, 21768091877166764, 263763834266637472

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: A354656 A115500 A214085 * A339197 A107916 A091775

Adjacent sequences: A125415 A125416 A125417 * A125419 A125420 A125421

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved