Integer part of Gauss's Arithmetic-Geometric Mean M(1,n^3).

Terms

a(0) =1a(1) =3a(2) =9a(3) =18a(4) =31a(5) =50a(6) =74a(7) =105a(8) =143a(9) =189a(10) =243a(11) =307a(12) =380a(13) =463a(14) =557a(15) =663a(16) =780a(17) =910a(18) =1054a(19) =1211a(20) =1382a(21) =1569a(22) =1770a(23) =1988a(24) =2222a(25) =2473a(26) =2742a(27) =3029a(28) =3334a(29) =3659