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1, 12, 97, 618, 3841, 21050, 119447, 615402, 3346316, 16708316, 88765368, 435341688, 2280888072, 11063821616, 57457039508, 276725405106, 1428712334412, 6848186443752, 35215486379288, 168242713587526, 862738339740944, 4112242003155592, 21045362383845012, 100147569980681634
(list;
graph;
refs;
listen;
history;
text;
internal format)
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