A125347 Number of base 10 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 10, 70, 430, 2990, 21210, 152752, 1107368, 8054662, 58680898, 427841510, 3120550894, 22764484280, 166081792328, 1211725839660, 8840879076060, 64504607657222, 470639150157006, 3433889688841786, 25054462942728214

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: A002802 A101029 A122892 * A005465 A229702 A337992

Adjacent sequences: A125344 A125345 A125346 * A125348 A125349 A125350

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved