A330554 Union of 2, A282178, and A330339.

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

Offset

1,1

Comments

Equivalently, primes that occur in columns 0, 1, or 2 of the triangle in A330339. [Corrected 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