Number of distinct values of i*j + j*k + k*i with 1 <= i<j<k <= n.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =10a(5) =20a(6) =31a(7) =48a(8) =70a(9) =96a(10) =123a(11) =161a(12) =197a(13) =240a(14) =293a(15) =340a(16) =394a(17) =460a(18) =524a(19) =596a(20) =670a(21) =744a(22) =819a(23) =918a(24) =1016a(25) =1112a(26) =1217a(27) =1322a(28) =1429a(29) =1561