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A003785 Coefficients of Jacobi cusp form of index 1 and weight 12. 21

%I #14 May 20 2014 22:59:16

%S 1,10,0,0,-88,-132,0,0,1275,736,0,0,-8040,-2880,0,0,24035,13080,0,0,

%T -14136,-54120,0,0,-128844,115456,0,0,389520,38016,0,0,-256410,

%U -697950,0,0,-806520,963160,0,0,1892363,938400,0,0,-1227600,-2309120,0,0,-813450,-2813096,0,0

%N Coefficients of Jacobi cusp form of index 1 and weight 12.

%D M. Eichler and D. Zagier, The Theory of Jacobi Forms, Birkhauser, 1985, p. 141.

%F (theta_3(z)^4+(theta_2(z)^4)/4)*eta(4z)^18*theta_4(z). - Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), May 11 2000

%F a(4*n+1) = a(4*n+2) = 0.

%e q^3 + 10*q^4 - 88*q^7 - 132*q^8 + 1275*q^11 + 736*q^12 - 8040*q^15 - ...

%o (PARI) {a(n) = local(A, A1); if( n<3, 0, n -= 3; A = x * O(x^n); A1 = (eta(x^2 + A)^3 / eta(x + A) / eta(x^4 + A)^2)^4 ; polcoeff( (A1 + 4 * x / A1) * eta(x^2 + A)^7 * eta(x^4 + A)^18 / eta(x + A)^2, n))} /* _Michael Somos_, Oct 24 2007 */

%Y Cf. A003784.

%K sign

%O 3,2

%A _N. J. A. Sloane_, Mar 15 1996

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Last modified August 12 23:59 EDT 2024. Contains 375113 sequences. (Running on oeis4.)