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1, 2, 12, 73, 503, 3661, 27715, 214664, 1691049, 13494718, 108864742, 886520081, 7279644889, 60225617740, 501640531350, 4204146605148, 35432735188076, 300170956721542, 2554988646383521, 21842628856370472, 187487872615533629, 1615346166853635465, 13965841907774754081
(list;
graph;
refs;
listen;
history;
text;
internal format)
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