A280406 Odd semiprimes that can be represented as 2p+3q, where p and q are primes, in an increasing number of ways.

15, 25, 55, 91, 115, 187, 215, 235, 335, 403, 415, 515, 535, 655, 695, 835, 955, 1115, 1195, 1393, 1405, 1555, 1895, 1963, 2095, 2155, 2335, 2395, 2615, 2815, 2995, 3235, 3295, 3635, 3935, 3985, 4295, 4415, 4435, 4735, 4855, 4915, 5095, 5515, 5815, 6415, 6835, 7135, 7195, 7415, 8035, 8135

Offset: 1

Author

Randy L. Ekl, Jan 02 2017

Keywords

• nonn

Comments

It is conjectured that all terms of this sequence above 1963 are divisible by 5. Initial search to 1000000.

Crossrefs

Cf. A046315, A280389.