A125386 Number of base 23 circular n-digit numbers with adjacent digits differing by 5 or less.

1, 23, 223, 1763, 16243, 152373, 1463803, 14257189, 140352907, 1392763463, 13907164503, 139550545465, 1405796327995, 14206023882853, 143917558809065, 1460937452350923, 14854348570127835, 151231000353544565

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..17.

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: A361750 A038514 A244766 * A091628 A126544 A272796

Adjacent sequences: A125383 A125384 A125385 * A125387 A125388 A125389

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved