A119572 a(n) = (2^(2^n) + 1 + 2^(2^(n + 1) - 1) + 1)/2

3, 7, 73, 16513, 1073774593, 4611686020574871553, 85070591730234615875067023894796828673, 28948022309329048855892746252171976963487637349870610241596083305694166515713

Offset

0,1

Links

Table of n, a(n) for n=0..7.

Mathematica

a=Table[(2^(2^n) + 1 + 2^(2^(n + 1) - 1) + 1)/2, {n, 0, 10}]

Crossrefs

Sequence in context: A088647 A075611 A191485 * A362651 A172995 A325476

Adjacent sequences: A119569 A119570 A119571 * A119573 A119574 A119575

Keyword

nonn

Author

Roger L. Bagula, May 31 2006

Extensions

Edited by N. J. A. Sloane, Jun 03 2006

Status

approved