A125420 Number of base 32 circular n-digit numbers with adjacent digits differing by 6 or less.

1, 32, 374, 3518, 38706, 433262, 4966664, 57723908, 678179722, 8033230502, 95776176084, 1147881518376, 13816482025668, 166893402582172, 2021942264811766, 24557337125061998, 298887955121933146

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(6) for base>=6.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]`-$[(i+1)mod N]`>6)+($[(i+1)mod N]`-$[i]`>6))

Crossrefs

Sequence in context: A055752 A362234 A250170 * A163690 A268999 A280602

Adjacent sequences: A125417 A125418 A125419 * A125421 A125422 A125423

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved