A334426 Decimal expansion of Product_{k>=1} (1 + 1/A002145(k)^3).

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

Offset

1,3

References

B. C. Berndt, Ramanujan's notebook part IV, Springer-Verlag, 1994, p. 64-65.

Links

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

Ph. Flajolet and I. Vardi, Zeta function expansions of some classical constants, Feb 18 1996, p. 7-8.

Formula

A334426 / A334427 = 28*zeta(3)/Pi^3.

A334424 * A334426 = 840*zeta(3)/Pi^6.

Example

1.041158072823444580338360569925615669376071...

Crossrefs

Cf. A002145, A243381, A334447, A334451.

Sequence in context: A173077 A131239 A114033 * A209417 A267990 A084061

Adjacent sequences: A334423 A334424 A334425 * A334427 A334428 A334429

Keyword

nonn,cons

Author

Vaclav Kotesovec, Apr 30 2020

Extensions

More digits from Vaclav Kotesovec, Jun 27 2020

Status

approved