A265127 a(n) = prime(n) * 2^n.

4, 12, 40, 112, 352, 832, 2176, 4864, 11776, 29696, 63488, 151552, 335872, 704512, 1540096, 3473408, 7733248, 15990784, 35127296, 74448896, 153092096, 331350016, 696254464, 1493172224, 3254779904, 6777995264, 13824425984, 28722593792, 58518929408, 121332826112

Offset: 1

Author

Altug Alkan, Dec 02 2015

Keywords

• nonn
• easy

Examples

			a(1) = 4 because prime(1) * 2^1 = 2 * 2 = 4.
		

Crossrefs

Cf. A000040, A000079.

Equals twice A110295. - David Radcliffe, Dec 03 2015

Programs

Magma

[NthPrime(n)*2^n: n in [1..30]]; // Vincenzo Librandi, Dec 03 2015

Mathematica

Array[Prime@# 2^# &, {30}] (* Michael De Vlieger, Dec 02 2015 *)

PARI

a(n) = prime(n) * 2^n;

Formula

a(n) = A000079(n) * A000040(n).