a(n) = floor(M(g(n-1)+1, ..., g(n))), where M = harmonic mean and g(n) = n^3.

Terms

a(0) =1a(1) =4a(2) =16a(3) =43a(4) =91a(5) =166a(6) =275a(7) =422a(8) =614a(9) =857a(10) =1158a(11) =1521a(12) =1953a(13) =2460a(14) =3049a(15) =3724a(16) =4492a(17) =5359a(18) =6332a(19) =7415a(20) =8615a(21) =9938a(22) =11391a(23) =12978a(24) =14706a(25) =16581a(26) =18610a(27) =20797a(28) =23149a(29) =25672