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A125439 Number of base 27 circular n-digit numbers with adjacent digits differing by 7 or less. 0
1, 27, 349, 3723, 46157, 583687, 7554133, 99104599, 1313531925, 17539619163, 235514695099, 3175602492309, 42952775347889, 582333628754047, 7908808568321989, 107551307959489303, 1463999937423331797 (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..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: A018797 A239220 A133050 * A339250 A202289 A010943

Adjacent sequences:  A125436 A125437 A125438 * A125440 A125441 A125442

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified November 27 12:03 EST 2021. Contains 349394 sequences. (Running on oeis4.)