A125329 Number of base 19 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 19, 121, 619, 3697, 22389, 138973, 874277, 5559985, 35648953, 230069191, 1492690207, 9727027549, 63617931357, 417371683689, 2745447557409, 18100412004049, 119567904627743, 791186114040565, 5243056748156375

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: A157340 A252054 A070302 * A126487 A241965 A182193

Adjacent sequences: A125326 A125327 A125328 * A125330 A125331 A125332

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved