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A254634 a(n) = 1 if 2*n + 1 is Sprime (A193258), else a(n) = 0. 1
1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0

LINKS

Table of n, a(n) for n=0..90.

Ian R Harris, Sprimes: A Sparse Prime-Like Sequence of Natural Numbers Generated by the Goldbach Conjecture, Technical report TR-375.

EXAMPLE

a(1) = 1 because 2*1+1 = 3 is Sprime;

a(2) = 0 because 2*2+1 = 5 is not Sprime;

a(3) = 1 because 2*3+1 = 7 is Sprime;

a(4) = 0 because 2*4+1 = 9 is not Sprime.

CROSSREFS

Cf. A193258, A101264.

Sequence in context: A087429 A093075 A104120 * A108336 A279733 A176723

Adjacent sequences:  A254631 A254632 A254633 * A254635 A254636 A254637

KEYWORD

nonn

AUTHOR

Ian R Harris, Feb 03 2015

EXTENSIONS

Terms a(58) and beyond from Andrew Howroyd, Dec 23 2019

STATUS

approved

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Last modified July 8 08:08 EDT 2020. Contains 335520 sequences. (Running on oeis4.)