big = 1 000 000 s = 0 S = Set([]) 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]))) other(p) = { for (v=1, oo, my (l=lcm(p,v)); if (!seen(l), see(l); return (v); ); ); } v=1; for (n=1, 10 000, print (n " " v); v=other(v)) quit