849856117940domain: NAppears in sequencesExpansion of (1-x)/(1 - 3*x - 2*x^2).at n=22A104934Number of n X 4 0..1 arrays with new values 0..1 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors.at n=10A208705