
REFERENCES

Alexander, D.; Cummins, C.; McKay, J.; and Simons, C.; Completely replicable functions, in Groups, Combinatorics & Geometry, (Durham, 1990), pp. 8798, London Math. Soc. Monograph No. 165.  N. J. A. Sloane, Jul 22 2012
R. E. Borcherds, Review of "Moonshine Beyond the Monster ..." (Cambridge, 2006), Bull. Amer. Math. Soc., 45 (2008), 675679.
H. Cohen, Course in Computational Number Theory, page 379.
J. H. Conway and S. P. Norton, Monstrous Moonshine, Bull. Lond. Math. Soc. 11 (1979) 308339.
D. Ford, J. McKay and S. P. Norton, More on replicable functions, Commun. Algebra 22, No. 13, 51755193 (1994).
M. Kaneko, Fourier coefficients of the elliptic modular function j(tau) (in Japanese), Rokko Lectures in Mathematics 10, Dept. Math., Faculty of Science, Kobe University, Rokko, Kobe, Japan, 2001.
J. McKay and H. Strauss, The qseries of monstrous moonshine and the decomposition of the head characters. Comm. Algebra 18 (1990), no. 1, 253278.
B. Schoeneberg, Elliptic Modular Functions, SpringerVerlag, NY, 1974, p. 56.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
J. G. Thompson, Some numerology between the FischerGriess Monster and the elliptic modular function, Bull. London Math. Soc., 11 (1979), 352353.
A. van Wijngaarden, On the coefficients of the modular invariant J(tau), Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, Series A, 56 (1953), 389400 [ gives 100 terms ].


PROG

(PARI) {a(n) = if( n<1, 0, polcoeff( ellj(x + x^3 * O(x^n))  720, n))}; /* Michael Somos, May 05 2012 */
(PARI) {a(n) = local(A); if( n<1, 0, n++; A = eta(x + x * O(x^n))^24; polcoeff( (1 + 65520 / 691 * (sum( k=1, n, sigma(k, 11) * x^k)  x * A)) / A, n))}; /* Michael Somos, May 05 2012 */
