A125457 - OEIS

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A125457

Number of base 22 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 22, 302, 3550, 47870, 659542, 9265904, 131528076, 1878769126, 26934314962, 386950683142, 5565891772078, 80115953724392, 1153662520101308, 16616496401513996, 239363596125252280, 3448339679603524870

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OFFSET

0,2

COMMENTS

[Empirical] a(base,n)=a(base-1,n)+F(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))

CROSSREFS

Sequence in context: A211559 A333063 A022746 * A155785 A077525 A083765

Adjacent sequences: A125454 A125455 A125456 * A125458 A125459 A125460

KEYWORD

nonn,base

AUTHOR

R. H. Hardin, Dec 28 2006

STATUS

approved