| 1, 2, 6, 12, 12, 4, 28, 56, 504, 2520, 27720, 27720, 27720, 27720, 5544, 11088, 188496, 62832, 1193808, 5969040, 1989680, 1989680, 45762640, 137287920, 686439600, 8923714800, 80313433200, 80313433200, 2329089562800, 2329089562800
(list; graph; listen)
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