A125399 - OEIS

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

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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