A261978 - OEIS

A261978

Expansion of (elliptic_E / elliptic_K)^(1/4) in powers of q.

1, -2, 6, -12, 14, -24, 84, -144, -42, 130, 1656, -3036, -9036, 17784, 76944, -147984, -591274, 1147068, 4784922, -9277164, -38983272, 75690528, 322116804, -625832880, -2687394012, 5224589254, 22613921832, -43985741688, -191670898032, 372970548504, 1634759644944, -3182191744320

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..31.

FORMULA

See A261975 for the g.f. for E/K.

CROSSREFS

Cf. A261975 (E/K), A261977 ((E/K)^(1/2)).

Cf. A261976 (K/E), A261979 ((K/E)^(1/2)), A261980 ((K/E)^(1/4)).

Cf. A004018 (elliptic K(q)), A194094 (elliptic E(q)), A115977 (elliptic k(q)^2).

Sequence in context: A140760 A161922 A027863 * A236264 A152301 A152389

Adjacent sequences: A261975 A261976 A261977 * A261979 A261980 A261981

KEYWORD

sign

AUTHOR

Joerg Arndt, Sep 07 2015

STATUS

approved