1,2

Table of n, a(n) for n=1..66.

The terms are the exponents in the expansion of 1/S read mod 2 where S = 1 + Sum_{p prime} x^p.

Cf. A108345, A132229.

Sequence in context: A250049 A132027 A306077 * A093713 A057472 A117577

Adjacent sequences: A103648 A103649 A103650 * A103652 A103653 A103654

nonn

Nadia Heninger and N. J. A. Sloane, Dec 16 2007

approved