A078916 a(n) = prime(n) + 2*n.

4, 7, 11, 15, 21, 25, 31, 35, 41, 49, 53, 61, 67, 71, 77, 85, 93, 97, 105, 111, 115, 123, 129, 137, 147, 153, 157, 163, 167, 173, 189, 195, 203, 207, 219, 223, 231, 239, 245, 253, 261, 265, 277, 281, 287, 291, 305, 319, 325, 329, 335, 343, 347, 359, 367, 375

Offset: 1

Author

Reinhard Zumkeller, Dec 13 2002

Keywords

• nonn

Crossrefs

Cf. A000040, A005843, A078917, A014688.

Programs

Magma

[ &+[(2*n+NthPrime(n))]: n in [1..1000] ]; // Vincenzo Librandi, Aug 01 2010

Formula

a(n) = A014688(n) + n. - Zak Seidov, Nov 10 2013

a(n) = A000040(n) + A005843(n). - Elmo R. Oliveira, Jan 21 2023