3847725domain: NAppears in sequencesOdd numbers k such that A318458(k) (bitwise-AND of k and sigma(k)-k) is equal to k.at n=15A324897Odd numbers k such that sigma(k) is congruent to 2 modulo 4 and k = A318458(k), where A318458(k) is bitwise-AND of k and sigma(k)-k.at n=1A324898