A371748 Decimal expansion of Product_{k>=0} (1 + 1/4^k).
2, 7, 1, 1, 8, 1, 9, 3, 4, 7, 7, 2, 6, 9, 5, 8, 7, 6, 0, 6, 9, 1, 0, 8, 8, 4, 6, 9, 7, 0, 7, 9, 1, 8, 6, 0, 2, 4, 4, 3, 3, 9, 9, 0, 8, 5, 6, 7, 4, 8, 8, 5, 4, 9, 4, 6, 9, 3, 0, 8, 0, 6, 2, 9, 0, 0, 6, 0, 2, 6, 2, 3, 6, 1, 3, 0, 5, 9, 7, 7, 8, 0, 0, 9, 7, 8, 7, 7, 4, 0, 5, 2, 5, 2, 1, 4, 6, 0, 4, 6
Offset: 1
Examples
2.71181934772695876069108846970791860244...
Links
- Kelvin Voskuijl, Table of n, a(n) for n = 1..20000
Programs
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Mathematica
RealDigits[QPochhammer[-1, 1/4], 10, 100][[1]]
Formula
Equals A065445^2. - Hugo Pfoertner, Apr 05 2024