A139305 a(n) = (2^(2p - 1)/32)-1, where p is the n-th Mersenne prime A000668(n).

0, 255, 72057594037927935, 452312848583266388373324160190187140051835877600158453279131187530910662655

Offset: 1

Author

Omar E. Pol, Apr 13 2008

Keywords

• nonn

Comments

Next term is too large to list here.

Crossrefs

Cf. A000668, A139286, A139294, A139295, A139296, A139297, A139298, A139299, A139300, A139301, A139302, A139303, A139304, A139306.

Programs

Mathematica

a[n_] := 2^(2^(MersennePrimeExponent[n] + 1) - 8) - 1; Array[a, 4] (* Amiram Eldar, Jul 10 2025 *)

Formula

a(n) = (2^(2*A000668(n)-1)/32)-1 = (A139294(n)/32)-1.

Extensions

Edited by Max Alekseyev, Apr 23 2010