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A125443 Number of base 31 circular n-digit numbers with adjacent digits differing by 7 or less. 0
1, 31, 409, 4399, 55177, 705211, 9228145, 122435659, 1641825097, 22192435141, 301837475369, 4125290661105, 56599464923761, 778943329190005, 10746475355730103, 148551954418570669, 2056701047801775993 (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: A300869 A297019 A022691 * A268137 A089375 A069582

Adjacent sequences:  A125440 A125441 A125442 * A125444 A125445 A125446

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved

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Last modified August 5 14:57 EDT 2021. Contains 346469 sequences. (Running on oeis4.)