| 1, 264, 13488, 278168, 3237984, 25290408, 147204624, 684347448, 2666539200, 9015945800, 27141718896, 74182306776, 186879023392, 439124493288, 971672262864, 2040402823544, 4092008534400, 7879085829000, 14630516376112, 26297796632856, 45903762942432
(list; graph; listen)
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