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A125465
Number of base 30 circular n-digit numbers with adjacent digits differing by 8 or less.
0
1, 30, 438, 5286, 74118, 1060350, 15523062, 230350206, 3452974422, 52140983322, 791632788028, 12067463948240, 184503077226834, 2827152678453978, 43391225163337048, 666768677804237076, 10254893704624993254
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
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: A296919 A010946 A022625 * A215193 A163130 A280856
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved