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1, 3, 4, 7, 18, 79, 334, 413, 1986, 2399, 11582, 48727, 109036, 157763, 266799, 958160, 48174799, 145482557, 193657356, 339139913, 871937182, 3826888641, 16179491746, 20006380387, 96205013294, 116211393681
(list; graph; refs; listen; history; internal format)
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