355926domain: NAppears in sequencesNumber of (2+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 2 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 2 3 4 6 or 7.at n=11A252409Number of path change-ringing sequences of length n for 4 bells.at n=15A324943