big = 1 000 000 s = 0 S = [] unseen = 1 seen(v) = if (v < big, bittest(s, v), setsearch(S, v)) see(v) = if (v < big, s = bitor(s, 2^v), S = setunion(S, [v])); while (seen(unseen), unseen++) { m = [2]; \\ multiples of primes for (n = 1, 10 000, if (n==1, v = 1, n==2, v = 2, ppp = pp*p; pi = 0; forprime (q = 2, oo, if (pi++ > #m, m = concat(m, q); ); if (ppp % q, while (seen(m[pi]), m[pi] += q; ); v = m[pi]; break; ); ); ); see(v); f = factor(v); print (n " " sum(k=1, #f~, 2^primepi(f[k, 1]))/2); [pp, p] = [p, v]; ); } quit