Expansion of theta series of E_7 lattice in powers of q^2.

Terms

a(0) =1a(1) =126a(2) =756a(3) =2072a(4) =4158a(5) =7560a(6) =11592a(7) =16704a(8) =24948a(9) =31878a(10) =39816a(11) =55944a(12) =66584a(13) =76104a(14) =99792a(15) =116928a(16) =133182a(17) =160272a(18) =177660a(19) =205128a(20) =249480a(21) =265104a(22) =281736a(23) =350784a(24) =382536a(25) =390726a(26) =470232a(27) =505568a(28) =532800a(29) =615384