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A125435 Number of base 23 circular n-digit numbers with adjacent digits differing by 7 or less. 0
1, 23, 289, 3047, 37137, 462163, 5880121, 75773539, 985257889, 12888815603, 169303842569, 2230130203467, 29431207313841, 388895110406371, 5143074692086361, 68054649404120347, 900857522223771201 (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: A010975 A022588 A199031 * A086943 A131273 A023021

Adjacent sequences:  A125432 A125433 A125434 * A125436 A125437 A125438

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified December 20 08:42 EST 2014. Contains 252241 sequences.