A064915 Positive integers n that are not of the form p + q * a^2, where p and q are primes and a is the smallest prime not dividing n.

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 16, 18, 22, 24, 26, 28, 30, 36, 42, 48, 54, 60, 66, 72, 77, 84, 90, 96, 102, 108, 114, 120, 126, 174, 180, 210, 240, 270, 300, 330, 420, 630, 840, 1050, 1260

Offset: 1

Author

Dean Hickerson, Oct 13 2001

Keywords

• nonn

Comments

There are no other terms up to 10^7. Conjecture: There are no more terms in the sequence.

Crossrefs

Cf. A064653.

Programs

Mathematica

rep[ n_ ] := Module[ {a, q}, For[ a=2, GCD[ n, a ]!=1, a++, Null ]; For[ q=2, q a^2