A125369 Number of base 32 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 32, 268, 1772, 13748, 108132, 871228, 7113068, 58698164, 488329172, 4089121128, 34423417280, 291070095356, 2470369205804, 21033518369320, 179580640999392, 1536920470892852, 13181385142142708, 113261618364481612

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..18.

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: A320407 A189651 A145711 * A126527 A265842 A248884

Adjacent sequences: A125366 A125367 A125368 * A125370 A125371 A125372

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved