A089529 A089528 indexed by A000040.

6, 12, 24, 59, 77, 78, 87, 88, 126, 135, 158, 312, 331, 379, 415, 445, 455, 456, 824, 924, 955, 971, 1069, 1080, 1148, 1226, 1368, 1402, 1480, 1592, 1597, 1826, 1934, 2002, 2014, 2035, 2093, 2187, 2212, 2254, 2315, 2353, 2461, 2587, 2619, 2653, 2766, 2792

Offset: 1

Author

Ray Chandler, Nov 07 2003

Keywords

• nonn

Examples

			prime(3)=5, 2*5 + 3 = 13 = prime(6);
prime(4)=7, 2*7 + 3 = 17 = prime(7).
		

Crossrefs

Subsequence of A089532.

Cf. A089526, A089527, A089528.

Formula

a(n) = k such that A089528(n) = A000040(k).

a(n) = A000720(A089528(n)). - Michel Marcus, Aug 04 2021

Extensions

Offset changed to 1 by Jinyuan Wang, Aug 04 2021