A125360 Number of base 23 circular n-digit numbers with adjacent digits differing by 4 or less.

1, 23, 187, 1223, 9347, 72573, 577279, 4654925, 37943939, 311837075, 2579551497, 21450968309, 179155113323, 1501673922057, 12625149738521, 106416815593683, 898941182378771, 7607848721495845, 64489085542582579, 547401698354394021

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: A274587 A302200 A269072 * A126518 A167467 A129052

Adjacent sequences: A125357 A125358 A125359 * A125361 A125362 A125363

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved