A sequence related to Ramanujan's tau function.

Terms

a(0) =1a(1) =-2a(2) =0a(3) =4a(4) =-24a(5) =36a(6) =0a(7) =-64a(8) =252a(9) =-290a(10) =0a(11) =396a(12) =-1472a(13) =1380a(14) =0a(15) =-944a(16) =4830a(17) =-4248a(18) =0a(19) =-1268a(20) =-6048a(21) =8040a(22) =0a(23) =12528a(24) =-16744a(25) =-3706a(26) =0a(27) =-20976a(28) =84480a(29) =-31284