A125340 Number of base 30 circular n-digit numbers with adjacent digits differing by 3 or less.

1, 30, 198, 1026, 6238, 38350, 241614, 1541878, 9944222, 64647846, 422988918, 2782157694, 18379498222, 121868659046, 810638482054, 5406986392966, 36151528042142, 242224492645286, 1626022574433846, 10933656445976458

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+A025012(n+1) for base>=3.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]`-$[(i+1)mod N]`>3)+($[(i+1)mod N]`-$[i]`>3))

Crossrefs

Sequence in context: A120339 A319334 A064247 * A126498 A029545 A200548

Adjacent sequences: A125337 A125338 A125339 * A125341 A125342 A125343

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved