1127844domain: NAppears in sequencesSquares when digits rotated right once remain square.at n=10A035126Number of 5 X n 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=11A209226Perfect powers k (exponent greater than 1) such that k-1 and k+1 are both semiprime.at n=18A276564