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A125374
Number of base 11 circular n-digit numbers with adjacent digits differing by 5 or less.
0
1, 11, 91, 671, 5551, 46761, 398065, 3401871, 29120743, 249448001, 2137362811, 18315799997, 156961741753, 1345147895869, 11527885950497, 98794030243881, 846666363905255, 7255947727689297, 62183631402541039, 532915135391447739
OFFSET
0,2
COMMENTS
[Empirical] a(base,n)=a(base-1,n)+F(5) for base>=5.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]`-$[(i+1)mod N]`>5)+($[(i+1)mod N]`-$[i]`>5))
CROSSREFS
Sequence in context: A055083 A016160 A005062 * A245599 A126532 A226868
KEYWORD
nonn,base
AUTHOR
R. H. Hardin, Dec 28 2006
STATUS
approved