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1, 1, 2, 2, 4, 4, 9, 12, 27, 49, 111, 236, 562, 1302, 3172, 7746, 19347, 48630, 123923, 317956, 823178, 2144518, 5623993, 14828075, 39300482, 104636894, 279794753, 751065509, 2023446206, 5469566586, 14830879661, 40330829031, 109972429568
(list; graph; refs; listen; history; internal format)
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