A125387 Number of base 24 circular n-digit numbers with adjacent digits differing by 5 or less.

1, 24, 234, 1854, 17134, 161174, 1552716, 15165944, 149730374, 1490228262, 14926037054, 150251733634, 1518627112228, 15399490881916, 156574262849028, 1595437555553204, 16285881610118342, 166484261636251310

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.int(n/2)+1 and F(d) is the largest coefficient in (1+x+...+x^(2d))^n.

Links

Table of n, a(n) for n=0..17.

Prog

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))

Crossrefs

Sequence in context: A297752 A027275 A027260 * A126545 A193168 A190020

Adjacent sequences: A125384 A125385 A125386 * A125388 A125389 A125390

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved