62938domain: NAppears in sequencesNumbers k such that 10^(2*k+1)-7*10^k-1 is prime.at n=11A115073k such that 10^(2*k+1)-j*10^k-1 is prime for some j = 1, 2, 4, 5, 7 or 8.at n=42A213881Number of n X n 0..1 arrays with every element equal to 2 or 3 king-move adjacent elements, with upper left element zero.at n=10A297808