A125352 Number of base 15 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 15, 115, 735, 5435, 40965, 315991, 2469909, 19495747, 154956453, 1237813755, 9923510469, 79762415747, 642295225197, 5178982417003, 41798669030805, 337575342572995, 2727627544083901, 22046802610388635, 178241899736229829

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: A113527 A044728 A091347 * A126510 A328725 A331211

Adjacent sequences: A125349 A125350 A125351 * A125353 A125354 A125355

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved