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A006195 Reversion of Jacobi theta_3. 3
1, -2, 8, -40, 222, -1316, 8160, -52272, 343220, -2297682, 15623760, -107611608, 749209832, -5264005060, 37277153920, -265788870480, 1906489923022, -13747860118724, 99606357848920, -724732875917064, 5293303253527704, -38795196044205056 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..21.

J.-G. Penaud, Arbres et Animaux, Ph.D. Dissertation, Université Bordeaux I, 1990, cover page and p. 76. (Annotated scanned copy)

Index entries for reversions of series

FORMULA

REVERT(A000122).

PROG

(PARI) N=66; x='x+O('x^N); /* that many terms */

Vec(serreverse(x*sum(n=-N, N, x^(n^2)))) /* show terms */ /* Joerg Arndt, May 25 2011 */

CROSSREFS

Sequence in context: A234938 A143388 A027282 * A214763 A219587 A092807

Adjacent sequences:  A006192 A006193 A006194 * A006196 A006197 A006198

KEYWORD

sign

AUTHOR

N. J. A. Sloane

EXTENSIONS

Signs corrected by N. J. A. Sloane, Dec 24 2001

STATUS

approved

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Last modified March 3 10:25 EST 2021. Contains 341760 sequences. (Running on oeis4.)