[1,1,6,31,171,921,5031,27281,148101,801901, 4336902,23415777,126254962,679805112,3655679442, 19634501447,105334380517,564471596667, 3021754455157,16160029793032,86339725851558, 460874548444683,2457961986888773, 13097958657023523,69740119667456018]