A125332 Number of base 22 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 22, 142, 730, 4390, 26742, 166966, 1056350, 6755686, 43557742, 282683662, 1844363158, 12086792278, 79504493454, 524626264542, 3471321731070, 23023441009542, 153019621221454, 1018866986428048, 6795005681508340

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: A275799 A185397 A179792 * A126490 A200776 A169722

Adjacent sequences: A125329 A125330 A125331 * A125333 A125334 A125335

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved