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A388521

Decimal expansion of (3+sqrt(5)) * exp(-Pi/2).

1, 0, 8, 8, 4, 7, 1, 5, 9, 2, 9, 0, 6, 4, 4, 7, 0, 1, 9, 2, 4, 8, 1, 3, 1, 8, 5, 4, 4, 0, 8, 9, 2, 5, 8, 1, 1, 9, 4, 5, 6, 6, 4, 7, 2, 8, 3, 3, 2, 8, 0, 7, 4, 6, 0, 3, 0, 8, 9, 3, 7, 3, 7, 8, 8, 7, 5, 5, 5, 4, 0, 2, 0, 8, 8, 8, 8, 1, 6, 6, 0, 2, 8, 6, 4, 7, 9

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OFFSET

1,3

LINKS

Paolo Xausa, Table of n, a(n) for n = 1..10000

Simon Plouffe, Numbers in the base e^Pi, 2025.

FORMULA

Empirical: Equals Sum_{k>=0} A112179(k) / exp(k*Pi).

EXAMPLE

1.0884715929064470192481318544089258119...

MATHEMATICA

First[RealDigits[Exp[-Pi/2]*(3 + Sqrt[5]), 10, 100]] (* Paolo Xausa, Sep 18 2025 *)