[1,6,30,186,1110,6630,39846,239010,1433910,
8603790,51622446,309733890,1858404990,11150428470,
66902565630,401415404586,2408492418870,
14450954480790,86705726950470,520234361647890,
3121406169699270,18728437018590366,
112370622111206670,674223732666113010]
|