A076688 a(n) = 2^(2^n-n-2).

1, 8, 1024, 33554432, 72057594037927936, 664613997892457936451903530140172288, 113078212145816597093331040047546785012958969400039613319782796882727665664

Offset

2,2

Comments

Integer values of 1/(2-Sum_{i=1..m} i/2^i).

The next term a(9) has 151 digits, and is too large to include in data. - Bernard Schott, Aug 27 2020

Links

Table of n, a(n) for n=2..8.

Maple

Data := [seq(2^(2^n-n-2),  n = 2..8)]; \\ Bernard Schott, Aug 26 2020

Mathematica

Table[2^(2^n - n - 2), {n, 2, 8}] (* Amiram Eldar, Aug 27 2020 *)

Crossrefs

Cf. A036799.

Subsequence of A289585.

Cf. A000225, A020491, A058891.

Sequence in context: A085533 A360773 A122067 * A004808 A320981 A316395

Adjacent sequences: A076685 A076686 A076687 * A076689 A076690 A076691

Keyword

nonn

Author

Benoit Cloitre, Oct 25 2002

Status

approved