A072672 Prime(n)*prime(2*n)+prime(n)+prime(2*n).

11, 31, 83, 159, 359, 531, 791, 1079, 1487, 2159, 2559, 3419, 4283, 4751, 5471, 7127, 8399, 9423, 11151, 12527, 13467, 15519, 16799, 20159, 22539, 24479, 26207, 28511, 29919, 32147, 37631, 41183, 43883, 47319, 52499, 54719, 59091, 62975, 66863

Offset: 1

Author

Reinhard Zumkeller, Jun 30 2002

Keywords

• nonn

Examples

			a(10) = A000040(10)*A000040(20)+A000040(10)+A000040(20) = 29*71+29+71 = 2159.
		

Crossrefs

Cf. A072668, A072673.