A139475 Number of digits in the decimal expansion of A139474(n).

1, 2, 11, 48, 783, 3135, 50170

Offset: 1

Author

Artur Jasinski, Apr 22 2008, Sep 29 2008

Keywords

• base
• nonn
• more

Crossrefs

Cf. A001109, A055642, A139473, A139474, A139476.

Programs

Mathematica

Table[Length[IntegerDigits[Expand[((2*Sqrt[2] + 3)^(2^(Prime[n] - 1) - 1) - (3 - 2*Sqrt[2])^(2^(Prime[n] - 1) - 1))/(4*Sqrt[2])]]], {n, 1, 6}]

Formula

a(n) = A055642(A139474(n)). - Amiram Eldar, Oct 13 2024

Extensions

a(7) from Amiram Eldar, Oct 13 2024