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Search: id:A091406
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| A091406 |
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Reversion of series for j-function. |
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+0
3
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| 1, 744, 750420, 872769632, 1102652742882, 1470561136292880, 2037518752496883080, 2904264865530359889600, 4231393254051181981976079, 6273346050902229242859370584, 9433668720359866477436486024652
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Invert j = 1/q + 744 + 196884*q + 21493760 + ... to get q = 1/j + 744/j^2 + 750420/j^2 + ...
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REFERENCES
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J. H. Silverman, Advanced Topics in the Arithmetic of Elliptic Curves, Springer, see p. 482.
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LINKS
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Y.-H. He, V. Jejjala, Modular Matrix Models.
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PROGRAM
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(PARI) a(n)=local(A); if(n<1, 0, A=O(x^n); A=x*(eta(x^2+A)/eta(x+A))^24; polcoeff(serreverse(A/(1+256*A)^3), n)) /* Michael Somos Jul 13 2004 */
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CROSSREFS
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Cf. A000521. See A066396 for another version.
Adjacent sequences: A091403 A091404 A091405 this_sequence A091407 A091408 A091409
Sequence in context: A000521 A066395 A161557 this_sequence A066396 A099819 A051978
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Mar 03 2004
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