Numbers of the form (7^i)*(12^j), with i, j >= 0.

Terms

a(0) =1a(1) =7a(2) =12a(3) =49a(4) =84a(5) =144a(6) =343a(7) =588a(8) =1008a(9) =1728a(10) =2401a(11) =4116a(12) =7056a(13) =12096a(14) =16807a(15) =20736a(16) =28812a(17) =49392a(18) =84672a(19) =117649a(20) =145152a(21) =201684a(22) =248832a(23) =345744a(24) =592704a(25) =823543a(26) =1016064a(27) =1411788a(28) =1741824a(29) =2420208