A125359 Number of base 22 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 22, 178, 1162, 8858, 68622, 544618, 4381798, 35637914, 292226842, 2411821538, 20009585090, 166720115762, 1394041188406, 11690891947304, 98287713954492, 828060495187498, 6988697529064642, 59072380033613392, 499951394598901592

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: A321268 A086604 A041932 * A126517 A197496 A107969

Adjacent sequences: A125356 A125357 A125358 * A125360 A125361 A125362

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved