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1, 2, 5, 12, 30, 75, 189, 478, 1211, 3076, 7818, 19901, 50680, 129179, 329383, 840336, 2144540, 5474889, 13980493, 35709394, 91228015, 233108456, 595740568, 1522725379, 3892624055, 9952119054, 25446913766, 65072487645
(list;
graph;
refs;
listen;
history;
text;
internal format)
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