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1, 2, 5, 12, 29, 68, 163, 376, 895, 2046, 4845, 11018, 25997, 58930, 138699, 313756, 737185, 1665342, 3908059, 8820378, 20681069, 46646884, 109305969, 246433804, 577207671, 1300924056, 3046122447, 6863883442, 16068177699
(list; graph; refs; listen; history; internal format)
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