A117979 a(n)=A117611(9n).

1, 1000000001, 999999999000000001, 1000000000000000000000000001, 1000000001000000000000000001000000001, 999999999000000001000000000999999999000000001

Offset

0,2

Links

Table of n, a(n) for n=0..5.

Formula

a(n)=sum{k=0..9n, L(C(9n,k)/3)*10^k} where L(j/p) is the Legendre symbol of j and p.

Crossrefs

Sequence in context: A017517 A204593 A017649 * A332308 A096213 A048939

Adjacent sequences: A117976 A117977 A117978 * A117980 A117981 A117982

Keyword

easy,nonn

Author

Paul Barry, Apr 06 2006

Status

approved