A157724 - OEIS

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A157724

Numbers that are the sum of two distinct primes but are not twice a prime.

1

5, 7, 8, 9, 12, 13, 15, 16, 18, 19, 20, 21, 24, 25, 28, 30, 31, 32, 33, 36, 39, 40, 42, 43, 44, 45, 48, 49, 50, 52, 54, 55, 56, 60, 61, 63, 64, 66, 68, 69, 70, 72, 73, 75, 76, 78, 80, 81, 84, 85, 88, 90, 91, 92, 96, 98, 99, 100, 102, 103, 104, 105, 108, 109, 110, 111, 112, 114, 115

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

EXAMPLE

10 = 3+7 is not a member since also 10 = 2*5.

CROSSREFS

Sequence in context: A137469 A043353 A023726 * A080644 A309277 A180241

Adjacent sequences: A157721 A157722 A157723 * A157725 A157726 A157727

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Jul 05 2010

STATUS

approved