Irregular triangle T(n,k) = P(n)*2^k, n >= 0, k = 0..floor(log_2 prime(k+1)), where P = A002110.

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =24a(6) =30a(7) =60a(8) =120a(9) =210a(10) =420a(11) =840a(12) =1680a(13) =2310a(14) =4620a(15) =9240a(16) =18480a(17) =30030a(18) =60060a(19) =120120a(20) =240240a(21) =480480a(22) =510510a(23) =1021020a(24) =2042040a(25) =4084080a(26) =8168160a(27) =9699690a(28) =19399380a(29) =38798760