A125322 - OEIS

A125322

Number of base 12 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 12, 72, 360, 2080, 12232, 73656, 449440, 2770016, 17195112, 107304872, 672224048, 4223186080, 26586825472, 167628931360, 1058056409920, 6683674433920, 42244783230496, 267124015799712, 1689602502335776

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OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.int(n/2)+1

LINKS

Table of n, a(n) for n=0..19.

PROG

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))

CROSSREFS

Sequence in context: A036392 A035472 A036398 * A126480 A030235 A088166

Adjacent sequences: A125319 A125320 A125321 * A125323 A125324 A125325

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved