

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




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 twosided, half were onesided.) See page 8.


CROSSREFS

Cf. A265011.
Sequence in context: A133013 A032369 A134729 * 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



