A125436 Number of base 24 circular n-digit numbers with adjacent digits differing by 7 or less.

1, 24, 304, 3216, 39392, 492544, 6298624, 81606304, 1067317248, 14050718688, 185820522784, 2465340570112, 32781260766464, 436559667792896, 5820017454078208, 77646928813225216, 1036440399775034368

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: A233876 A171742 A187851 * A096821 A168303 A053215

Adjacent sequences: A125433 A125434 A125435 * A125437 A125438 A125439

Keyword

nonn,base

Author

R. H. Hardin, Dec 28 2006

Status

approved