Floor(M(g(n-1)+1,..,g(n))), where M = harmonic mean and g(n) = n(n + 1)(n + 2)/6.

Terms

a(0) =1a(1) =2a(2) =7a(3) =14a(4) =27a(5) =45a(6) =69a(7) =101a(8) =141a(9) =191a(10) =252a(11) =323a(12) =408a(13) =506a(14) =618a(15) =746a(16) =890a(17) =1052a(18) =1233a(19) =1432a(20) =1653a(21) =1895a(22) =2159a(23) =2447a(24) =2759a(25) =3097a(26) =3462a(27) =3853a(28) =4274a(29) =4724