| 1, 1, 1, 2, 4, 9, 22, 59, 167, 501, 1585, 5258, 18215, 65676, 245738, 951740, 3806961, 15696503, 66594623, 290279233, 1298168196, 5948954024, 27903067710, 133818411722, 655573653819, 3277868269096, 16713914267109, 86848046111951
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