Triangular numbers which are 7-almost primes.

Terms

a(0) =2080a(1) =4560a(2) =8128a(3) =9180a(4) =10296a(5) =10440a(6) =12720a(7) =12880a(8) =15400a(9) =18336a(10) =18528a(11) =21528a(12) =23220a(13) =23436a(14) =29403a(15) =29646a(16) =37128a(17) =39060a(18) =43956a(19) =52326a(20) =56280a(21) =61425a(22) =64980a(23) =67896a(24) =70500a(25) =81810a(26) =82215a(27) =86320a(28) =86736a(29) =93096