A242716 Composite numbers of the form A242489(n) - 3.

12317, 50637287, 147111617, 5174048597

Offset: 1

Author

Vladimir Shevelev and Peter J. C. Moses, May 21 2014

Keywords

• nonn
• more

Comments

a(5) (if it exists) = A242489(k) - 3, k >= 5 * 10^7. - Hiroaki Yamanouchi, Sep 22 2014

Examples

			a(1) = A242489(25) - 3 = 12317 = 109 * 113;
a(2) = A242489(900) - 3 = 50637287 = 7103 * 7129;
a(3) = A242489(1436) - 3 = 147111617 = 12097 * 12161;
a(4) = A242489(7084) - 3 = 5174048597 = 71789 * 72073.
		

Crossrefs

Cf. A242489, A242490, A242770.

Extensions

a(4) from Hiroaki Yamanouchi, Sep 22 2014