A226914 Third column of A226518.

1, 0, 0, 2, 0, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 0, 0, 0, 2, 2, 2, 0, 2, 2, 0, 2, 0, 0, 2, 2, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 0, 2, 2, 0, 2, 0, 2, 0, 0, 2, 2, 2, 0, 2, 2, 0, 2, 0, 2, 0, 0, 0, 2, 2, 0, 0, 2, 0, 0, 2, 2, 2, 0, 0, 2, 0, 0, 2, 2, 0, 0, 2, 2, 2, 0, 2, 2, 0, 2, 0, 2, 2, 0, 0, 2, 0, 2, 0, 0

Offset

1,4

Links

Table of n, a(n) for n=1..100.

Formula

a(n) = 1 + Legendre(2,prime(n)).

Crossrefs

Cf. A226518, A226523, A226915.

Sequence in context: A118508 A029305 A339441 * A110036 A308046 A289323

Adjacent sequences: A226911 A226912 A226913 * A226915 A226916 A226917

Keyword

nonn

Author

N. J. A. Sloane, Jun 22 2013

Status

approved