[sage-support] Fast Ramanujan's tau function

Hi, Consider: def tau(m): q = PowerSeriesRing(QQ, 'q', default_prec=12).gen() pq=prod([(1-q^k)^24 for k in range(1,m)]) return pq.coefficients()[:m] tau(20) [1, -24, 252, -1472, 4830, -6048, -16744, 84480, -113643, -115920, 534612, -370944, -577738, 401856, 1217160, 987136,

Re: [sage-support] Fast Ramanujan's tau function

On Sun, Jan 17, 2010 at 10:11 PM, Rolandb rola...@planet.nl wrote: Hi, Consider: def tau(m):    q = PowerSeriesRing(QQ, 'q', default_prec=12).gen()    pq=prod([(1-q^k)^24 for k in range(1,m)])    return pq.coefficients()[:m] tau(20) [1, -24, 252, -1472, 4830, -6048, -16744, 84480,