175043domain: NAppears in sequencesDenominators of continued fraction convergents to sqrt(789).at n=11A042521Number of (n+2) X (7+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=19A252383