A322851 a(n) = floor(2^(2^(n/2))-1).

1, 1, 3, 6, 15, 49, 255, 2544, 65535, 6479346, 4294967295, 41981937869755, 18446744073709551615, 1762483107300123635910219390, 340282366920938463463374607431768211455

Offset

0,3

Comments

A051179 is a bisection of this sequence.

Links

Table of n, a(n) for n=0..14.

Mathematica

Array[Floor[2^(2^(#/2)) - 1] &, 15, 0] (* Michael De Vlieger, Jan 04 2019 *)

Prog

(PARI) a(n) = floor(2^(2^(n/2)))-1; \\ Michel Marcus, Jan 15 2019

Crossrefs

Cf. A051179. A322852 is the base-e analog.

Sequence in context: A277063 A051169 A051610 * A230950 A370888 A327437

Adjacent sequences: A322848 A322849 A322850 * A322852 A322853 A322854

Keyword

nonn,easy

Author

Greg Huber, Dec 28 2018

Status

approved