A069479 Smallest n-tuply-lonely non-twin prime.

23, 1039, 403026797, 121829611399

Offset: 1

Author

Neil Fernandez, Mar 25 2002

Keywords

• hard
• nonn

Comments

a(3) found by Hans Havermann; a(4) by Phil Carmody.

Examples

			An n-tuply lonely non-twin prime is a non-twin prime that is sandwiched between exactly n pairs of prime twins on both sides. a(2)=1039 because 1039 is the first non-twin to be sandwiched between exactly 2 pairs of twins on each side (1019,1021,1031,1033 and 1049,1051,1061,1063).
		

Crossrefs

Cf. A007510, A069453, A069456.