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1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 7, 8, 9, 10, 12, 13, 15, 17, 20, 22, 25, 28, 32, 36, 40, 45, 51, 57, 64, 71, 79, 89, 99, 110, 122, 137, 152, 168, 186, 208, 230, 253, 280, 311, 343, 378, 416, 461, 507, 558, 613, 675
(list; graph; refs; listen; history; internal format)
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