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A226914 Third column of A226518. 1
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 (list; graph; refs; listen; history; text; internal format)
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: A035461 A118508 A029305 * A110036 A308046 A289323

Adjacent sequences:  A226911 A226912 A226913 * A226915 A226916 A226917

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jun 22 2013

STATUS

approved

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Last modified July 8 17:40 EDT 2020. Contains 335524 sequences. (Running on oeis4.)