A334482 Decimal expansion of Product_{k>=1} (1 + 1/A007528(k)^2).

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

Offset

1,3

Comments

Product_{k>=1} (1 - 1/A007528(k)^2) = 9*A175646/Pi^2 = 0.9429084997268899069451546585312672145658112624159...

Links

Table of n, a(n) for n=1..105.

Formula

A334481 * A334482 = 54/(5*Pi^2).

Example

1.058760201782545491315895454572153336734712663249...

Crossrefs

Cf. A007528, A175646, A334479, A334481.

Sequence in context: A021867 A346192 A165909 * A243598 A230366 A358361

Adjacent sequences: A334479 A334480 A334481 * A334483 A334484 A334485

Keyword

nonn,cons

Author

Vaclav Kotesovec, May 02 2020

Extensions

More digits from Vaclav Kotesovec, Jun 27 2020

Status

approved