Number of distinct products ijk with 1 <= i,j,k <= n.

Terms

a(0) =1a(1) =4a(2) =10a(3) =16a(4) =30a(5) =40a(6) =65a(7) =80a(8) =100a(9) =120a(10) =173a(11) =194a(12) =266a(13) =301a(14) =343a(15) =378a(16) =492a(17) =536a(18) =678a(19) =732a(20) =804a(21) =876a(22) =1075a(23) =1130a(24) =1247a(25) =1343a(26) =1450a(27) =1537a(28) =1833a(29) =1909