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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. a(n) = 2*(n of A204814) when a204814(n) = 0. Related to Goldbach's conjecture in that (Conjecture:) even numbers 2626 and greater are the sum of two Ramanujan primes. - John W. Nicholson, Jan 26 2017 LINKS 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: A121744 A336986 A198832 * A005795 A319827 A327905 Adjacent sequences:  A173631 A173632 A173633 * A173635 A173636 A173637 KEYWORD nonn AUTHOR Donovan Johnson, Nov 23 2010 STATUS approved

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Last modified May 13 19:36 EDT 2021. Contains 343868 sequences. (Running on oeis4.)