349535domain: NAppears in sequencesPartial sums of A005578.at n=19A086445Number of (n+1) X (2+1) 0..2 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with values 0..2 introduced in row major order.at n=18A231390a(n) = Sum_{k=1..n} (-1)^(n+k)*A087322(n,k).at n=14A341549