A125444 Number of base 32 circular n-digit numbers with adjacent digits differing by 7 or less.

1, 32, 424, 4568, 57432, 735592, 9646648, 128268424, 1723898392, 23355640616, 318418881444, 4362769334956, 60013762678824, 828186113644064, 11458464283369534, 158866331111116138, 2206333146498574632

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(7) for base>=7.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]`-$[(i+1)mod N]`>7)+($[(i+1)mod N]`-$[i]`>7))

Crossrefs

Sequence in context: A145403 A125116 A145217 * A022692 A160142 A159544

Adjacent sequences: A125441 A125442 A125443 * A125445 A125446 A125447

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved