Poincaré series [or Poincare series] for ring of modular forms of genus 2.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =1a(7) =0a(8) =1a(9) =0a(10) =2a(11) =0a(12) =3a(13) =0a(14) =2a(15) =0a(16) =4a(17) =0a(18) =4a(19) =0a(20) =5a(21) =0a(22) =6a(23) =0a(24) =8a(25) =0a(26) =7a(27) =0a(28) =10a(29) =0