Floor( product_{k = 1..n} k^(1/k) ).

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =5a(6) =7a(7) =9a(8) =11a(9) =14a(10) =18a(11) =22a(12) =27a(13) =33a(14) =39a(15) =47a(16) =55a(17) =65a(18) =76a(19) =89a(20) =102a(21) =118a(22) =135a(23) =154a(24) =176a(25) =199a(26) =225a(27) =254a(28) =285a(29) =319