A125354 - OEIS

A125354

Number of base 17 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 17, 133, 857, 6413, 48867, 381313, 3016163, 24107789, 194175677, 1573174523, 12802874695, 104553143825, 856091328837, 7024086050415, 57721845597987, 474910998928093, 3910960204957435, 32229946522723645, 265747140536421765

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OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+A025014(n+1) for base>=4.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]`-$[(i+1)mod N]`>4)+($[(i+1)mod N]`-$[i]`>4))

CROSSREFS

Sequence in context: A259418 A253416 A275483 * A126512 A297018 A196783

Adjacent sequences: A125351 A125352 A125353 * A125355 A125356 A125357

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved