A125463 Number of base 28 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 28, 404, 4852, 67556, 960148, 13958756, 205641268, 3058942852, 45812752948, 689466153924, 10412174282164, 157628891411396, 2390475045101652, 36296487695153124, 551594042350858612, 8387602963201535236

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(8) for base>=8.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..16.

Prog

(S/R) stvar $[N]:(0..M-1) init $[]:=0 asgn $[]->{*} kill +[i in 0..N-1](($[i]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))

Crossrefs

Sequence in context: A042518 A297179 A269255 * A161571 A161956 A162370

Adjacent sequences: A125460 A125461 A125462 * A125464 A125465 A125466

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved