A100102 a(n) = 2^(2*n)-(2*n-1).

2, 3, 13, 59, 249, 1015, 4085, 16371, 65521, 262127, 1048557, 4194283, 16777193, 67108839, 268435429, 1073741795, 4294967265, 17179869151, 68719476701, 274877906907, 1099511627737, 4398046511063, 17592186044373, 70368744177619, 281474976710609, 1125899906842575

Offset: 0

Author

Jorge Coveiro, Dec 26 2004

Keywords

• nonn
• easy

Links

• Amiram Eldar, Table of n, a(n) for n = 0..1660

Crossrefs

Cf. A000302, A005408, A119386.

Programs

Maple

seq(2^(2*n)-(2*n-1),n=0..20);

Mathematica

Table[2^(2*n) - (2*n - 1), {n, 0, 25}] (* Amiram Eldar, Dec 01 2021 *)

Formula

a(n) = A000302(n) - A005408(n-1). - Amiram Eldar, Dec 01 2021

Extensions

More terms from Emeric Deutsch, Feb 15 2005