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

Terms

a(0) =0a(1) =1a(2) =4a(3) =9a(4) =18a(5) =26a(6) =44a(7) =57a(8) =76a(9) =93a(10) =135a(11) =153a(12) =212a(13) =245a(14) =282a(15) =317a(16) =414a(17) =452a(18) =575a(19) =624a(20) =690a(21) =759a(22) =935a(23) =986a(24) =1103a(25) =1196a(26) =1297a(27) =1378a(28) =1645a(29) =1716