[1,1,3,10,38,154,654,2871,12925,59345,276835, 1308320,6250832,30142360,146510216,717061938, 3530808798,17478955570,86941210950,434299921440, 2177832612120,10959042823020,55322023332420, 280080119609550,1421744205767418,7234759677699954]