A074870 Smallest interprimes of the form n*prime.

4, 6, 12, 15, 12, 21, 56, 18, 30, 473, 60, 26, 42, 30, 176, 34, 198, 4883, 60, 42, 154, 69, 72, 50, 754, 81, 56, 667, 60, 93, 64, 99, 102, 105, 72, 111, 76, 195, 120, 205, 462, 86, 1364, 225, 138, 3337, 144, 2303, 150, 102, 260, 1537, 108, 165, 1624, 399, 754

Offset: 2

Author

Zak Seidov, Sep 12 2002

Keywords

• easy
• nonn

Comments

Interprimes of the form n*prime are in A075277-A075296 ( n = 2 - 21 ). Case n=1 is impossible. First 20 terms in the sequence are first terms in A075277-A075296.

Examples

			a(8)=56 because 56 is the smallest interprime of the form 8*prime.
		

Crossrefs

Cf. A075277-A075296.

Extensions

a(50) corrected by Sean A. Irvine, Jan 31 2025