Numbers k with the property that k^2 is a product of two distinct triangular numbers.

Terms

a(0) =0a(1) =6a(2) =30a(3) =35a(4) =84a(5) =180a(6) =204a(7) =210a(8) =297a(9) =330a(10) =546a(11) =840a(12) =1170a(13) =1189a(14) =1224a(15) =1710a(16) =2310a(17) =2940a(18) =2970a(19) =3036a(20) =3230a(21) =3900a(22) =4914a(23) =6090a(24) =6930a(25) =7134a(26) =7140a(27) =7245a(28) =7440a(29) =8976