440076domain: NAppears in sequencesNumber of length 2+2 0..n arrays with no pair in any consecutive three terms totalling exactly n.at n=25A245997Number of nX4 0..1 arrays with every element unequal to 0, 1, 3 or 8 king-move adjacent elements, with upper left element zero.at n=19A304217a(n) = n^2 - n^3 + n^4.at n=26A309372