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A127393 Expansion of k/q^(1/2) in powers of q, where k is the elliptic function defined by sqrt(k) = theta_2/theta_3. 2
4, -16, 56, -160, 404, -944, 2072, -4320, 8648, -16720, 31360, -57312, 102364, -179104, 307672, -519808, 864960, -1419456, 2299832, -3682400, 5831784, -9141808, 14194200, -21842368, 33329700, -50456352, 75813240, -113107872, 167616832, -246811504, 361218392, -525598496 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

4*A001938. See A001938, the main entry for this sequence, for further information.

CROSSREFS

Cf. A001938.

Sequence in context: A134968 A127634 A115108 * A073388 A109634 A026126

Adjacent sequences:  A127390 A127391 A127392 * A127394 A127395 A127396

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com), Apr 01 2007

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Last modified February 15 07:42 EST 2012. Contains 205717 sequences.