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A125328 Number of base 18 circular n-digit numbers with adjacent digits differing by 3 or less. 0
1, 18, 114, 582, 3466, 20938, 129642, 813586, 5161418, 33012690, 212531034, 1375465890, 8940439306, 58322410658, 381620168176, 2503490173972, 16459423126778, 108417784128158, 715300322712000, 4725856346389840 (list; graph; refs; listen; history; text; internal format)
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: A192511 A324623 A244866 * A126486 A251937 A061803

Adjacent sequences: A125325 A125326 A125327 * A125329 A125330 A125331

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified March 31 00:51 EDT 2023. Contains 361623 sequences. (Running on oeis4.)