34148domain: NAppears in sequencesPositions of 11's in A131744.at n=17A133152Number of (n+2) X (2+2) 0..1 arrays with every 2 X 2 and 3X3 subblock diagonal maximum minus antidiagonal minimum nondecreasing horizontally and vertically.at n=21A253504Fourth Lie-Betti number of a path graph on n vertices.at n=26A362007