A090610 A090609 indexed by A000040.

5, 7, 13, 26, 30, 60, 66, 71, 79, 113, 123, 135, 160, 227, 255, 265, 288, 338, 342, 353, 392, 408, 484, 514, 517, 538, 660, 666, 719, 736, 771, 852, 869, 973, 1034, 1081, 1111, 1133, 1251, 1269, 1309, 1362, 1396, 1448, 1456, 1477, 1482, 1592, 1656, 1702, 1756

Offset: 1

Author

Ray Chandler, Dec 06 2003

Keywords

• nonn
• easy

Crossrefs

Cf. A089144, A090606, A090607, A090608, A090609.

Formula

a(n)=k such that A000040(k)=A090609(n).

Extensions

Offset changed to 1 by Jinyuan Wang, Aug 03 2021