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2, 1, 2, 3, 5, 11, 22, 46, 100, 220, 494, 1130, 2617, 6135, 14528, 34711, 83581, 202654, 494410, 1212912, 2990511, 7406844, 18421178, 45988059, 115207838, 289540842, 729832977, 1844715643, 4674594883, 11873860646, 30227731181, 77112265803
(list; graph; refs; listen; history; internal format)
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