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A125424 Number of base 12 circular n-digit numbers with adjacent digits differing by 7 or less. 0
1, 12, 124, 1188, 12356, 129492, 1361746, 14331126, 150856188, 1588078260, 16718137334, 175997231290, 1852781990558, 19504865161846, 205334357806520, 2161624764528348, 22756160755947020, 239561861905201388 (list; graph; refs; listen; history; text; internal format)
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..17.

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: A173578 A291065 A273586 * A163147 A120918 A262573

Adjacent sequences:  A125421 A125422 A125423 * A125425 A125426 A125427

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified October 24 05:38 EDT 2021. Contains 348217 sequences. (Running on oeis4.)