A331421 Decimal expansion of Sum_{n >= 2} (-1)^n/log_2(n).

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

Offset

0,1

Comments

A slowly converging series.

Links

Table of n, a(n) for n=0..86.

Daniel Hoyt, Python 3 program using series acceleration.

Formula

Equals A002162 * A099769. - M. F. Hasler, Jan 31 2020

Example

0.64067586775192729126561661179177777...

Prog

(PARI) sumalt(k=2, (-1)^k/log(k))*log(2) \\ Edited by M. F. Hasler, Jan 31 2020

Crossrefs

Cf. A002162, A099769, A257837, A257964, A257972, A257898, A257960, A257812.

Sequence in context: A190575 A189038 A097047 * A197581 A323525 A166978

Adjacent sequences: A331418 A331419 A331420 * A331422 A331423 A331424

Keyword

nonn,cons

Author

Daniel Hoyt, Jan 16 2020

Status

approved