A125451 Number of base 16 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 16, 200, 2248, 28184, 358936, 4608164, 59321572, 764448248, 9854829592, 127060867900, 1638314863036, 21124741699196, 272388388188556, 3512262279620630, 45288269086891558, 583962105396237864

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: A154249 A226869 A257289 * A154348 A129333 A001810

Adjacent sequences: A125448 A125449 A125450 * A125452 A125453 A125454

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved