Triangular numbers which are the sum of two squares.

Terms

a(0) =0a(1) =1a(2) =10a(3) =36a(4) =45a(5) =136a(6) =153a(7) =325a(8) =666a(9) =820a(10) =1225a(11) =1378a(12) =2080a(13) =2628a(14) =2701a(15) =3240a(16) =3321a(17) =4005a(18) =4753a(19) =5050a(20) =6786a(21) =7381a(22) =9316a(23) =10440a(24) =10585a(25) =11026a(26) =14365a(27) =16290a(28) =18721a(29) =19306