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

1,1

Links

Table of n, a(n) for n=1..30.

Formula

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

Example

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

Mathematica

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

Prog

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

Crossrefs

Cf. A000040, A000079.

Equals twice A110295. - David Radcliffe, Dec 03 2015

Sequence in context: A248325 A344122 A328533 * A056274 A335806 A058353

Adjacent sequences: A265124 A265125 A265126 * A265128 A265129 A265130

Keyword

nonn,easy

Author

Altug Alkan, Dec 02 2015

Status

approved