A125429 Number of base 17 circular n-digit numbers with adjacent digits differing by 7 or less.

1, 17, 199, 2033, 23607, 279877, 3370321, 40874221, 497526487, 6066862739, 74045709039, 904121783791, 11042016273681, 134870318846579, 1647431387273605, 20123781851762053, 245820128763454759

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(7) for base>=7.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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))

Crossrefs

Sequence in context: A177076 A196491 A017932 * A244002 A201258 A166216

Adjacent sequences: A125426 A125427 A125428 * A125430 A125431 A125432

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved