[1,1,2,6,24,120,720,3720,17304,76110,329462, 1441923,6487445,29555588,135025756,615260976, 2791161792,12618600768,57008446080,257708989200, 1166042944564,5279435858788,23908888017477, 108262665958797,490132089640318,2218641353956314]