A309209 Continued fraction expansion of the negation of the constant defined by A265011 (among other formulas, this is Sum_{k >= 1} arctan((-1)^k/k)).

-1, 2, 36, 1, 40, 1, 94, 1, 1

Offset

0,2

Links

Table of n, a(n) for n=0..8.

W. M. Gosper, Material from Bill Gosper's Computers & Math talk, M.I.T., 1989, i+38+1 pages, annotated and scanned, included with the author's permission. (There are many blank pages because about half of the original pages were two-sided, half were one-sided.) See page 8.

Crossrefs

Cf. A265011.

Sequence in context: A032369 A134729 A342674 * A094716 A094725 A095397

Adjacent sequences: A309206 A309207 A309208 * A309210 A309211 A309212

Keyword

sign,cofr,more

Author

N. J. A. Sloane, Jul 29 2019; definition corrected Jul 30 2019 (Thanks to Jianing Song for pointing out that something was wrong.)

Extensions

Name corrected by Jianing Song, Aug 30 2019

Status

approved