Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

1,2

Table of n, a(n) for n=1..61.

{1} U {A005408 \ A076274 }. [R. J. Mathar, May 21 2010]

Cf. A000010, A000040, A005408.

Sequence in context: A194468 A053217 A144931 * A192992 A176852 A130569

Adjacent sequences: A166254 A166255 A166256 * A166258 A166259 A166260

nonn,easy

Juri-Stepan Gerasimov, Oct 10 2009

Entries checked by R. J. Mathar, May 21 2010.

approved