a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for 1<=i 2, 3, 4, 5, 6, 7, 9, 11, 13, 15, 18, 19, 21, 25, 27, 31, 33, 34, 36, 39, 42, 43, 45, 48, 49
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