Numbers divisible by the squares of two distinct primes.

Terms

a(0) =36a(1) =72a(2) =100a(3) =108a(4) =144a(5) =180a(6) =196a(7) =200a(8) =216a(9) =225a(10) =252a(11) =288a(12) =300a(13) =324a(14) =360a(15) =392a(16) =396a(17) =400a(18) =432a(19) =441a(20) =450a(21) =468a(22) =484a(23) =500a(24) =504a(25) =540a(26) =576a(27) =588a(28) =600a(29) =612