A089525 A089450 indexed by A000040.

77, 87, 455, 3386, 7811, 11926, 12233, 12705, 13448, 15382, 16338, 17462, 17844, 18387, 18580, 20577, 22492, 25001, 26060, 32604, 34578, 42718, 52713, 55807, 60272, 65730, 67963, 77232, 85964, 92239, 98963, 99587, 100386, 102163, 103689

Offset: 1

Author

Ray Chandler, Nov 07 2003

Keywords

• nonn

Examples

			prime(44)=193, 2*193 + 3 = 389 = prime(77);
prime(45)=197, 2*197 + 3 = 397 = prime(78);
prime(46)=199, 2*199 + 3 = 401 = prime(79).
		

Crossrefs

Subsequence of A089529.

Cf. A088066, A088119, A089450.

Formula

a(n) = k such that A089450(n) = A000040(k).

a(n) = A000720(A089450(n)). - Michel Marcus, Aug 04 2021

Extensions

Offset changed to 1 by Jinyuan Wang, Aug 04 2021