A092504 a(n) = prime(n) + prime(n^2).

4, 10, 28, 60, 108, 164, 244, 330, 442, 570, 692, 864, 1050, 1236, 1474, 1672, 1938, 2204, 2504, 2812, 3156, 3540, 3886, 4300, 4734, 5152, 5622, 6114, 6590, 7110, 7700, 8292, 8874, 9480, 10080, 10778, 11478, 12212, 12910, 13672, 14506, 15282, 16068

Offset: 1

Author

Giovanni Teofilatto, Apr 05 2004

Keywords

• nonn

Examples

			a(1) = 4 because prime(1) = 2 and prime(1) = 2.
a(2) = 10 because prime(2) = 3 and prime(4) = 7.
a(3) = 28 because prime(3) = 5 and prime(9) = 23.
		

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..3500

Crossrefs

Cf. A000040, A011757.

Programs

Magma

[NthPrime(n^2)+ NthPrime(n): n in [1..40]]; // Vincenzo Librandi, Jul 25 2025

Mathematica

Table[Prime[n] + Prime[n^2], {n, 45}] (* Robert G. Wilson v, Apr 08 2004 *)

Formula

a(n) = A000040(n) + A011757(n). - Elmo R. Oliveira, Mar 22 2023

Extensions

Corrected and extended by Robert G. Wilson v, Apr 08 2004