A125327 Number of base 17 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 17, 107, 545, 3235, 19487, 120311, 752895, 4762851, 30376427, 194992877, 1258241573, 8153851075, 53026892117, 345868792705, 2261537247275, 14818530646995, 97269300449331, 639438066653237, 4208955700527261

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: A224322 A142321 A007682 * A126485 A159031 A080441

Adjacent sequences: A125324 A125325 A125326 * A125328 A125329 A125330

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved