A125452 Number of base 17 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 17, 217, 2465, 31465, 409037, 5372965, 70853093, 935884585, 12370240043, 163551397657, 2162617244343, 28597315302781, 378163094731205, 5000764642734763, 66129475365595985, 874488915318715897

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: A016293 A139733 A016185 * A322538 A016238 A016181

Adjacent sequences: A125449 A125450 A125451 * A125453 A125454 A125455

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved