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 A330554 Union of 2, A282178, and A330339. 1
 2, 3, 7, 37, 43, 53, 79, 89, 107, 113, 1471, 1579, 1663, 3491, 3547, 3659, 3691, 3719, 3779, 3821, 3823, 3851, 3947, 3989, 4079, 4583, 4657, 4679, 4703, 27271, 28643, 28661, 28663, 28711, 29021, 29023, 41603, 41641, 41651, 41669, 41999, 42443, 42787, 42899, 44249, 44263, 44279, 45971, 50599, 50909, 56053, 57041 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Equivalently, primes that occur in columns 0, 1, or 2 of the triangle in A330339. [Corrrected by Walter Trump, Dec 23 2019] The asymptotic behavior of A282178 and A330339 is a mystery. It is not even known if they are infinite. They are closely related. A282178 contains primes == 3 mod 4, and A330339 primes == 1 mod 4. Perhaps by combining them in this way some properties will become more visible. LINKS Giovanni Resta, Table of n, a(n) for n = 1..25000 (first 1269 terms from N. J. A. Sloane) CROSSREFS Cf. A282178, A330339, A330545, A330547. Sequence in context: A135907 A027624 A165744 * A304524 A034900 A079388 Adjacent sequences:  A330551 A330552 A330553 * A330555 A330556 A330557 KEYWORD nonn AUTHOR N. J. A. Sloane, Dec 22 2019 STATUS approved

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Last modified April 7 04:20 EDT 2020. Contains 333292 sequences. (Running on oeis4.)