197447domain: NAppears in sequencesa(n+1) = smallest number that is not the sum of a(n) or fewer terms of a(1),...,a(n).at n=5A034692Number of (2+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=20A252386