Number of distinct products ijk with 0 <= i,j,k <= n.

Terms

a(0) =1a(1) =2a(2) =5a(3) =11a(4) =17a(5) =31a(6) =41a(7) =66a(8) =81a(9) =101a(10) =121a(11) =174a(12) =195a(13) =267a(14) =302a(15) =344a(16) =379a(17) =493a(18) =537a(19) =679a(20) =733a(21) =805a(22) =877a(23) =1076a(24) =1131a(25) =1248a(26) =1344a(27) =1451a(28) =1538a(29) =1834