A125481 Number of base 24 circular n-digit numbers with adjacent digits differing by 9 or less.

1, 24, 366, 4794, 71946, 1103274, 17241126, 272084382, 4318731786, 68774290062, 1097231236566, 17523514179426, 280025416243206, 4476263547270006, 71567092311364148, 1144341462099767544, 18298809277285998746

Offset

0,2

Comments

[Empirical] a(base,n)=a(base-1,n)+F(9) for base>=9.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]`-$[(i+1)mod N]`>9)+($[(i+1)mod N]`-$[i]`>9))

Crossrefs

Sequence in context: A052741 A046905 A028115 * A028074 A028111 A168304

Adjacent sequences: A125478 A125479 A125480 * A125482 A125483 A125484

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved