Theta series of A_6 lattice.

Terms

a(0) =1a(1) =42a(2) =210a(3) =350a(4) =882a(5) =1050a(6) =1750a(7) =2100a(8) =3570a(9) =3066a(10) =5250a(11) =5124a(12) =7350a(13) =7350a(14) =10500a(15) =8064a(16) =14322a(17) =12600a(18) =15330a(19) =15750a(20) =22050a(21) =16814a(22) =25620a(23) =22260a(24) =29750a(25) =25242a(26) =36750a(27) =28700a(28) =44100a(29) =35364