big = 1 000 000
s = 0
S = Set([])
unseen = 1
seen(v) = if (v < big, bit test(s, v), set search(S, v))
see(v) = if (v < big, s = bit or(s, 2^v), S = set union(S, Set([v]))); while (seen(unseen), unseen++)

a = vector(3333)
emit(v) = {
	print (n++ " " v);
	see(v);
	if (n<=#a,
		a[n]=v;
	);
}

{
	emit(1);
	for (n=1, #a,
		for (v=unseen, oo,
			if (!seen(v),
				r=v/a[n];
				if (type(w=v*r)==type(42) && !seen(w),
					emit(v);
					emit(w);
					break;
				);
			);
		);
	);
}

quit