Integers that can be expressed as a product of triangular numbers in 3 different ways.

Terms

a(0) =630a(1) =3780a(2) =14850a(3) =16380a(4) =21420a(5) =114660a(6) =131670a(7) =159390a(8) =178200a(9) =234360a(10) =401940a(11) =478800a(12) =523260a(13) =556920a(14) =582120a(15) =712530a(16) =749700a(17) =835380a(18) =1455300a(19) =1753290a(20) =1936935a(21) =2086920a(22) =2162160a(23) =2633400a(24) =2841300a(25) =3828825a(26) =4791150a(27) =5821200a(28) =6056820a(29) =6380010