842090474940domain: NAppears in sequencesNumber of 2n-step polygons on cubic lattice.at n=9A002896Moment sequence of tr(A^6) in USp(6).at n=18A138547Number of 2*n X 18 binary arrays with row sums 9 and column sums n.at n=2A172554Number of 9*n X 2*n 0..1 arrays with row sums 2 and column sums 9.at n=1A172616