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

Terms

a(0) =378a(1) =630a(2) =990a(3) =3240a(4) =4095a(5) =4950a(6) =5460a(7) =9180a(8) =15400a(9) =19110a(10) =25200a(11) =31878a(12) =37128a(13) =37950a(14) =39060a(15) =52650a(16) =61425a(17) =79800a(18) =97020a(19) =103740a(20) =105570a(21) =122265a(22) =145530a(23) =157080a(24) =161028a(25) =176715a(26) =192510a(27) =221445a(28) =265356a(29) =288420