a(n) = floor(Sum_{k=2..n} log(k)^2).

Terms

a(0) =0a(1) =1a(2) =3a(3) =6a(4) =9a(5) =13a(6) =17a(7) =22a(8) =27a(9) =33a(10) =39a(11) =46a(12) =53a(13) =60a(14) =68a(15) =76a(16) =84a(17) =93a(18) =102a(19) =111a(20) =120a(21) =130a(22) =140a(23) =151a(24) =161a(25) =172a(26) =183a(27) =195a(28) =206a(29) =218