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A173634 Even numbers that are not the sum of 2 Ramanujan primes (A104272). 5
2, 6, 8, 10, 12, 14, 16, 18, 20, 24, 26, 30, 32, 36, 38, 42, 44, 48, 50, 54, 56, 60, 62, 66, 68, 72, 74, 80, 86, 90, 92, 98, 102, 104, 110, 116, 120, 122, 128, 132, 140, 146, 150, 152, 158, 170, 176, 182, 188, 200, 206, 212, 230, 232, 236, 242, 260, 266, 272, 284, 290, 314, 320, 344, 350, 372, 386, 398, 424, 428, 452, 484, 512, 542, 556, 564, 572, 626, 632, 644, 686, 692, 764, 962, 986, 1022, 1028, 1070, 1532, 1712, 1742, 1766, 2078, 2582, 2624 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

No other terms < 2*10^8. Conjectured to be complete.

LINKS

Table of n, a(n) for n=1..95.

Eric Weisstein's World of Mathematics, Ramanujan Prime

Wikipedia, Ramanujan prime

EXAMPLE

68 is a term because no 2 Ramanujan primes sum to 68. 70 is not a term because 11 + 59 = 70. 11 and 59 are both Ramanujan primes.

CROSSREFS

Cf. A104272.

Sequence in context: A028772 A121744 A198832 * A005795 A157502 A216032

Adjacent sequences:  A173631 A173632 A173633 * A173635 A173636 A173637

KEYWORD

nonn

AUTHOR

Donovan Johnson, Nov 23 2010

STATUS

approved

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Last modified April 18 22:57 EDT 2014. Contains 240734 sequences.