Numbers divisible by prime ceilings of their square roots + 1.

Terms

a(0) =2a(1) =4a(2) =6a(3) =9a(4) =20a(5) =25a(6) =42a(7) =49a(8) =110a(9) =121a(10) =156a(11) =169a(12) =272a(13) =289a(14) =342a(15) =361a(16) =506a(17) =529a(18) =812a(19) =841a(20) =930a(21) =961a(22) =1332a(23) =1369a(24) =1640a(25) =1681a(26) =1806a(27) =1849a(28) =2162a(29) =2209