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A301991 Terms of A301857 where both A301857(n) and its counterpart are composite. 0
185, 323, 403, 527, 551, 779, 959, 899, 1139, 1147, 1517, 1649, 1643, 1751, 1763, 1943, 2071, 2363, 2509, 2561, 2603, 2669, 2827, 2747, 2831, 2993, 3635, 3139, 3649, 3791, 3737, 3893, 4031, 4087, 4453, 4553, 5615, 4883, 4891, 5663, 5069 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A301857 selects the least solutions to A023900 where a023900(j) + a023900(k) = 0 and the pair j,k are coprime.

LINKS

Table of n, a(n) for n=1..41.

EXAMPLE

185 is a term because a301857(11) = 185 and both 185 and 273 are composite.

CROSSREFS

Subsequence of A301857; cf. A023900.

Sequence in context: A129311 A252272 A247529 * A136048 A209373 A207076

Adjacent sequences:  A301988 A301989 A301990 * A301992 A301993 A301994

KEYWORD

nonn

AUTHOR

Torlach Rush, Mar 30 2018

STATUS

approved

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Last modified November 29 23:27 EST 2020. Contains 338780 sequences. (Running on oeis4.)