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6, 41, 321, 2561, 20481, 163841, 1310721, 10485761, 83886081, 671088641, 5368709121, 42949672961, 343597383681, 2748779069441, 21990232555521, 175921860444161, 1407374883553281, 11258999068426241, 90071992547409921
(list;
graph;
refs;
listen;
history;
text;
internal format)
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