A026506 a(n) = least positive integer > a(n-1) and not a(j)*a(k) + a(k)*a(i) + a(i)*a(j) for 1<=i<=j<=k<=n.

1, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 26, 28, 30, 31, 32, 36, 38, 42, 46, 49, 50, 52, 58, 60, 66, 70, 71, 78, 86, 87, 88, 97, 100, 102, 103, 106, 109, 119, 122, 130, 135, 136, 139, 148, 149, 150, 151, 153, 158, 163, 167, 169, 172