Number of distinct products i*j*k for 1 <= i < j <= k <= n.

Terms

a(0) =0a(1) =1a(2) =4a(3) =10a(4) =20a(5) =27a(6) =46a(7) =61a(8) =84a(9) =101a(10) =147a(11) =163a(12) =226a(13) =256a(14) =292a(15) =331a(16) =434a(17) =472a(18) =601a(19) =655a(20) =719a(21) =785a(22) =968a(23) =1016a(24) =1143a(25) =1233a(26) =1346a(27) =1433a(28) =1713a(29) =1778