Triangular numbers that are the product of two triangular numbers greater than 1.

Terms

a(0) =36a(1) =45a(2) =210a(3) =630a(4) =780a(5) =990a(6) =1540a(7) =2850a(8) =3570a(9) =4095a(10) =4851a(11) =8778a(12) =11781a(13) =15400a(14) =17955a(15) =19110a(16) =21528a(17) =25200a(18) =26565a(19) =26796a(20) =33930a(21) =37128a(22) =40755a(23) =43956a(24) =61425a(25) =61776a(26) =70125a(27) =79800a(28) =105570a(29) =113050