| 1, 2, 3, 20, 1, 42, 231, 3432, 12870, 48620, 16796, 88179, 117572, 10400600, 2111400, 3447056, 100180065, 51857916, 756261275, 35345263800, 68923264410, 48932534040, 420819792744, 8233430727600, 10749201227700, 63205303218876, 15997372030584
(list; graph; listen)
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