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A205616 Even numbers that are not the sum of two non-Ramanujan primes (A174635). 2
2, 4, 52, 70, 100, 124, 130, 148, 208, 232, 238, 292, 352, 418, 628 (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..15.

J. Sondow, Ramanujan primes and Bertrand's postulate, Amer. Math. Monthly 116 (2009), 630-635.

J. Sondow, J. W. Nicholson, and T. D. Noe, Ramanujan Primes: Bounds, Runs, Twins, and Gaps, J. Integer Seq. 14 (2011) Article 11.6.2

EXAMPLE

70 is a term because no two non-Ramanujan primes (A174635) sum to 70. 72 is not a term because 19 + 53 = 72. 19 and 53 are both non-Ramanujan primes.

CROSSREFS

Cf. A104272, A174635, A173634, A204814, A205301, A205617, A205618.

Sequence in context: A211169 A085325 A082661 * A115587 A018337 A092389

Adjacent sequences:  A205613 A205614 A205615 * A205617 A205618 A205619

KEYWORD

nonn

AUTHOR

John W. Nicholson and Donovan Johnson, Jan 30 2012

STATUS

approved

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Last modified July 25 02:57 EDT 2021. Contains 346282 sequences. (Running on oeis4.)