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1, 2, 4, 5, 11, 26, 52, 92, 198, 249, 560, 1311, 2776, 6367, 14086, 21007, 48034, 56031, 131781, 317515, 695541, 804219, 2011535, 4555083, 8040378, 18688105, 25235398, 59995537, 68141074, 165243129, 407951724, 927908528
(list;
graph;
refs;
listen;
history;
text;
internal format)
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