A026441 a(n) = least positive integer > a(n-1) and not a(i)+a(j)-1 for 1<=i<=j<=n, n >= 2.

2, 4, 5, 6, 8, 10, 12, 13, 14, 16, 17, 18, 20, 21, 22, 26, 28, 30, 32, 34, 36, 37, 38, 40, 42, 44, 45, 46, 48, 50, 52, 53, 54, 56, 57, 58, 60, 61, 62, 65, 66, 68, 70, 72, 74, 76, 78, 80, 81, 82, 85, 86, 88, 90, 92, 93, 94, 96, 97, 98