A125489 Number of base 32 circular n-digit numbers with adjacent digits differing by 9 or less.

1, 32, 518, 6962, 108578, 1728482, 28149368, 464599244, 7743848026, 129978213530, 2192713621708, 37126026014824, 630255487661516, 10719498624749596, 182565758245973662, 3112315935214304042

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.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..15.

Prog

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))

Crossrefs

Sequence in context: A248070 A366551 A146124 * A084486 A161640 A161987

Adjacent sequences: A125486 A125487 A125488 * A125490 A125491 A125492

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved