92868domain: NAppears in sequencesIndices of primes in sequence defined by A(0) = 53, A(n) = 10*A(n-1) + 33 for n > 0.at n=24A101582Number of nX3 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 3,3,0,2,2 for x=0,1,2,3,4.at n=9A197452