A125374 Number of base 11 circular n-digit numbers with adjacent digits differing by 5 or less.

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

Links

Table of n, a(n) for n=0..19.

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

Adjacent sequences: A125371 A125372 A125373 * A125375 A125376 A125377

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved