Coefficients in q-expansion of E_2^2, where E_2 is the Eisenstein series shown in A006352.

Terms

a(0) =1a(1) =-48a(2) =432a(3) =3264a(4) =9456a(5) =21600a(6) =39744a(7) =66432a(8) =105840a(9) =147984a(10) =220320a(11) =281664a(12) =393792a(13) =475104a(14) =646272a(15) =743040a(16) =980592a(17) =1091232a(18) =1432944a(19) =1536960a(20) =1965600a(21) =2118144a(22) =2649024a(23) =2761344a(24) =3516480a(25) =3557040a(26) =4433184a(27) =4594560a(28) =5575296a(29) =5603040