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#19 by Charles R Greathouse IV at Fri Mar 12 22:24:46 EST 2021
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M. Michael Somos, <a href="/A010815/a010815.txt">Introduction to Ramanujan theta functions</a>
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Discussion
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| Fri Mar 12
| 22:24
| OEIS Server: https://oeis.org/edit/global/2897
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#18 by N. J. A. Sloane at Wed Nov 13 21:54:14 EST 2019
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M. Somos, <a href="http://cis.csuohio.edu/~somos="/A010815/multiqa010815.pdftxt">Introduction to Ramanujan theta functions</a>
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Discussion
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| Wed Nov 13
| 21:54
| OEIS Server: https://oeis.org/edit/global/2830
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#17 by N. J. A. Sloane at Tue Jun 27 21:39:10 EDT 2017
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#16 by G. C. Greubel at Tue Jun 27 21:27:33 EDT 2017
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#15 by G. C. Greubel at Tue Jun 27 21:27:25 EDT 2017
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G. C. Greubel, <a href="/A185338/b185338.txt">Table of n, a(n) for n = -1..1000</a>
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| STATUS
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approved
editing
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#14 by Michael Somos at Fri Apr 24 13:39:52 EDT 2015
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#13 by Michael Somos at Fri Apr 24 13:39:40 EDT 2015
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| EXAMPLE
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G.f. = 1/q - 2 + 2*q^3 - q^7 - 2*q^11 + 3*q^15 + 2*q^19 - 4*q^23 - 4*q^27 + 5*q^31 + ...
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a[ n_] := SeriesCoefficient[ 2 EllipticTheta[ 4, 0, q] / EllipticTheta[ 2, 0, q^4] , {], {q, 0, n}]; (* Michael Somos, Jul 21 2014 *)
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approved
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Discussion
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| Fri Apr 24
| 13:39
| Michael Somos: Light and space edits.
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#12 by Alois P. Heinz at Wed Mar 04 07:09:54 EST 2015
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#11 by Alois P. Heinz at Wed Mar 04 07:09:50 EST 2015
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| COMMENTS
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A generator (HaumptmodulHauptmodul) of the function field associated with congruence subgroup Gamma_0(16). [Yang 2004] - Michael Somos, Jul 21 2014
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#10 by Michael Somos at Mon Jul 21 20:12:02 EDT 2014
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