67166528domain: NAppears in sequencesNumbers k such that the sum of prime divisors of k is congruent to 2^k (mod k).at n=20A051423Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=14A231296