Least common multiple (or LCM) of first n positive triangular numbers (A000217).

Terms

a(0) =1a(1) =3a(2) =6a(3) =30a(4) =30a(5) =210a(6) =420a(7) =1260a(8) =1260a(9) =13860a(10) =13860a(11) =180180a(12) =180180a(13) =180180a(14) =360360a(15) =6126120a(16) =6126120a(17) =116396280a(18) =116396280a(19) =116396280a(20) =116396280a(21) =2677114440a(22) =2677114440a(23) =13385572200a(24) =13385572200a(25) =40156716600a(26) =40156716600