Number of ordered ways of writing n as the sum of 2 triangular numbers.

Terms

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