a(1) = 1, a(2) = 2; then all new products of subsets of pre-existing terms which include the most recent, then the first integer not present and so on.
A123664
a(1) = 1, a(2) = 2; then all new products of subsets of pre-existing terms which include the most recent, then the first integer not present and so on.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =6a(4) =4a(5) =8a(6) =12a(7) =24a(8) =48a(9) =72a(10) =144a(11) =5a(12) =10a(13) =15a(14) =20a(15) =30a(16) =40a(17) =60a(18) =80a(19) =90a(20) =120a(21) =160a(22) =180a(23) =240a(24) =320a(25) =360a(26) =480a(27) =720a(28) =960a(29) =1080
External references
- oeis: A123664