A139239 First differences of Mersenne numbers A001348, divided by 2.

2, 12, 48, 960, 3072, 61440, 196608, 3932160, 264241152, 805306368, 67645734912, 1030792151040, 3298534883328, 65970697666560, 4433230883192832, 283726776524341248, 864691128455135232, 72634054790231359488, 1106804644422573096960, 3541774862152233910272, 297509088420787648462848

Offset: 1

Author

Omar E. Pol, Apr 19 2008

Keywords

• easy
• nonn

Links

• Paolo Xausa, Table of n, a(n) for n = 1..450

Crossrefs

Cf. A001348, A139229, A139235, A139238, A139240, A139242.

Programs

Mathematica

Differences[2^Prime[Range[25]]-1]/2 (* Paolo Xausa, Oct 20 2023 *)

Formula

a(n) = A139238(n)/2.

Extensions

a(10)-a(21) from Paolo Xausa, Oct 20 2023