[0,1,0,7,8,51,100,407,1008,3451,9500,30207,87208, 268451,791700,2402407,7152608,21567051,64482700, 193885007,580781208,1744091251,5228778500, 15693326007,47065997008,141225953051,423621935100, 1270977653407]