%I A091406
%S A091406 1,744,750420,872769632,1102652742882,1470561136292880,
%T A091406 2037518752496883080,2904264865530359889600,4231393254051181981976079,
%U A091406 6273346050902229242859370584,9433668720359866477436486024652
%N A091406 Reversion of series for j-function.
%C A091406 Invert j = 1/q + 744 + 196884*q + 21493760 + ... to get q = 1/j + 744/
               j^2 + 750420/j^2 + ...
%D A091406 J. H. Silverman, Advanced Topics in the Arithmetic of Elliptic Curves, 
               Springer, see p. 482.
%H A091406 Y.-H. He, V. Jejjala, <a href="http://arXiv.org/abs/hep-th/0307293">Modular 
               Matrix Models</a>.
%o A091406 (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 
               */
%Y A091406 Cf. A000521. See A066396 for another version.
%Y A091406 Sequence in context: A000521 A066395 A161557 this_sequence A066396 A099819 
               A051978
%Y A091406 Adjacent sequences: A091403 A091404 A091405 this_sequence A091407 A091408 
               A091409
%K A091406 nonn,easy
%O A091406 1,2
%A A091406 N. J. A. Sloane (njas(AT)research.att.com), Mar 03 2004