1,3

Table of n, a(n) for n=1..96.

Cf. A161357, A168339. Equals A145288(n)-2.

Sequence in context: A089881 A251547 A084320 * A120699 A072643 A130260

Adjacent sequences: A161355 A161356 A161357 * A161359 A161360 A161361

nonn

R. H. Hardin and N. J. A. Sloane, Nov 27 2009

Corrected definition and flipped sign in the formula - R. J. Mathar, Mar 06 2010

approved