A139473 a(n)=((2*Sqrt[2] + 3)^(2^(n - 1) - 1) - (3 - 2*Sqrt[2])^(2^(n - 1) - 1))/(4*Sqrt[2]).

0, 1, 35, 40391, 53789260175, 95393218491883573553951, 300027707381709879256191290532493317737977820735

Offset: 1

Author

Artur Jasinski, Apr 22 2008

Keywords

• nonn

Crossrefs

Cf. A001109, A139474, A139475, A139476.

Programs

Mathematica

Table[Expand[((2*Sqrt[2] + 3)^(2^(n - 1) - 1) - (3 - 2*Sqrt[2])^(2^(n - 1) - 1))/(4*Sqrt[2])], {n, 1, 10}] (*Artur Jasinski*)