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Number of digits in the decimal expansion of A139474(n).
4

%I #8 Oct 13 2024 07:08:02

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

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

%F a(n) = A055642(A139474(n)). - _Amiram Eldar_, Oct 13 2024

%t 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}]

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

%K base,nonn,more

%O 1,2

%A _Artur Jasinski_, Apr 22 2008, Sep 29 2008

%E a(7) from _Amiram Eldar_, Oct 13 2024