A125462 Number of base 27 circular n-digit numbers with adjacent digits differing by 8 or less.

1, 27, 387, 4635, 64275, 910047, 13176603, 193286799, 2861938467, 42649954911, 638456984747, 9587390463271, 144280174667379, 2174497641266991, 32806154775168315, 495286442631446295, 7481115443229599555

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(8) for base>=8.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]`-$[(i+1)mod N]`>8)+($[(i+1)mod N]`-$[i]`>8))

Crossrefs

Sequence in context: A000535 A251770 A033280 * A326605 A296853 A036222

Adjacent sequences: A125459 A125460 A125461 * A125463 A125464 A125465

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved