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

1,1

Links

Table of n, a(n) for n=1..100.

Formula

Equals A065445^2. - Hugo Pfoertner, Apr 05 2024

Example

2.71181934772695876069108846970791860244...

Mathematica

RealDigits[QPochhammer[-1, 1/4], 10, 100][[1]]

Crossrefs

Cf. A000302, A065445, A081845, A100221, A132323, A371747, A371749, A371751.

Sequence in context: A258715 A011340 A081705 * A324329 A340208 A201889

Adjacent sequences: A371745 A371746 A371747 * A371749 A371750 A371751

Keyword

nonn,cons

Author

Ilya Gutkovskiy, Apr 05 2024

Status

approved