A125323 - OEIS

A125323

Number of base 13 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 13, 79, 397, 2311, 13683, 82987, 510131, 3168583, 19831375, 124840519, 789359815, 5007964879, 31854401891, 203018085727, 1295846704827, 8280758646855, 52962057017063, 338958602652535, 2170431924516647

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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: A142056 A173831 A081584 * A075584 A126481 A032625

Adjacent sequences: A125320 A125321 A125322 * A125324 A125325 A125326

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved