1542999domain: NAppears in sequencesNumber of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and column sum not equal to 0 3 5 6 or 7 and every 3 X 3 diagonal and antidiagonal sum equal to 0 3 5 6 or 7.at n=34A252253Least integer k such that k/2^n > 1/e.at n=22A293340