A125399 Number of base 11 circular n-digit numbers with adjacent digits differing by 6 or less.

1, 11, 101, 851, 7861, 73361, 687911, 6458645, 60663405, 569855705, 5353272231, 50289664667, 472432405351, 4438140914777, 41692951349661, 391673541192251, 3679474891298093, 34565867184632063, 324720024734460965

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..18.

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: A001603 A113403 A045624 * A163146 A037550 A138894

Adjacent sequences: A125396 A125397 A125398 * A125400 A125401 A125402

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved