Triangular numbers which are 5-almost primes.

Terms

a(0) =120a(1) =300a(2) =378a(3) =496a(4) =630a(5) =780a(6) =990a(7) =1128a(8) =1485a(9) =1540a(10) =1596a(11) =2556a(12) =2628a(13) =2850a(14) =3160a(15) =3321a(16) =3570a(17) =3828a(18) =4095a(19) =4851a(20) =5778a(21) =5886a(22) =6328a(23) =6786a(24) =7750a(25) =8778a(26) =9045a(27) =9870a(28) =10878a(29) =11781