A190999 a(n) = 2^(n^2)*(2^(2*n+1) - 1).

1, 14, 496, 65024, 33488896, 68685922304, 562881233944576, 18446181123756130304, 2417833192485184639860736, 1267648182376590172238353793024, 2658454723919231517578212623857483776, 22300742540074631571703972465034240945291264

Offset

0,2

Comments

First differences of A002416.

Links

Muniru A Asiru, Table of n, a(n) for n = 0..49

Maple

a:= n-> (f-> f(n+1)-f(n))(j->2^(j^2)):
seq(a(n), n=0..12);  # Alois P. Heinz, Jan 31 2019

Mathematica

A002416 = Table[2^(n^2), {n, 0, 20}]; GetDiff[seq_List] := Drop[seq, 1] - Drop[seq, -1]; A190999 = GetDiff[A002416]

Prog

(PARI) a(n) = 2^(n^2)*(2^(2*n+1) - 1) \\ Georg Fischer, Jan 31 2019
(Sage) [2^(n^2)*(2^(2*n+1) - 1) for n in (0..20)] # Georg Fischer, Jan 31 2019

Crossrefs

Cf. A002416.

Sequence in context: A251867 A240411 A024299 * A320288 A344114 A233014

Adjacent sequences: A190996 A190997 A190998 * A191000 A191001 A191002

Keyword

nonn,easy

Author

Vladimir Joseph Stephan Orlovsky, Jun 18 2011

Extensions

Entry revised by N. J. A. Sloane, Dec 08 2018, with new offset.

Programs and offset in b-file modified by Georg Fischer, Jan 31 2019.

Status

approved