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1, 5, 14, 39, 108, 299, 828, 2299, 6401, 17875, 50062, 140601, 395933, 1117737, 3162812, 8969267, 25487555, 72565339, 206969662, 591304797, 1691991626, 4848703909, 13914119144, 39980978277, 115023510495, 331303274449
(list; graph; refs; listen; history; internal format)
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