A090606 A089144 indexed by A000040.

1, 2, 4, 7, 8, 15, 16, 17, 19, 27, 30, 31, 37, 52, 57, 61, 65, 75, 76, 78, 87, 91, 106, 112, 113, 118, 143, 145, 155, 158, 165, 184, 188, 207, 220, 229, 237, 241, 265, 269, 278, 288, 295, 306, 307, 311, 312, 332, 346, 360, 368, 383, 388, 393, 404, 418, 439, 449

Offset: 1

Author

Ray Chandler, Dec 06 2003

Keywords

• nonn

Comments

Prime(k)*6 - 3 -+ 2 are both prime. - Juri-Stepan Gerasimov, Mar 19 2010

Crossrefs

Cf. A089144, A090607, A090608, A090609, A090610.

Formula

a(n)=k such that A000040(k)=A089144(n).

Extensions

Offset changed to 1 by Jinyuan Wang, Aug 03 2021