|
1, 0, 2, 0, 15, 40, 153, 480, 1841, 6528, 23901, 87040, 322875, 1198080, 4474738, 16773120, 63164175, 238605640, 904213989, 3435921408, 13089461538, 49977753600, 191219550297, 733007052640, 2814750270420, 10825959997440, 41699998413248, 160842834247680
(列表;图表;参考;听;历史;文本;内部格式)
|
|