Triangular numbers n divisible by the number of triangular numbers smaller than n.

Terms

a(0) =0a(1) =6a(2) =15a(3) =28a(4) =36a(5) =55a(6) =105a(7) =120a(8) =210a(9) =231a(10) =378a(11) =496a(12) =528a(13) =666a(14) =990a(15) =1540a(16) =2145a(17) =2556a(18) =2628a(19) =3081a(20) =4095a(21) =4186a(22) =5460a(23) =5565a(24) =6105a(25) =6555a(26) =7140a(27) =8128a(28) =8256a(29) =9316