84655domain: NAppears in sequencesa(n) = -Sum_{0<=i<j<=n} (-1)^(i+j) * (i+j)!/(i!*j!).at n=10A306409Numbers k such that A109812(k) AND A109812(k+2) = 0 (where AND denotes the bitwise AND operator).at n=39A352773Number of fillomino dissections of a 2 X n rectangle.at n=8A359703