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1, 11, 96, 672, 3980, 20503, 93975, 389453, 1478299, 5192488, 17020341, 52432182, 152709107, 422668071, 1116703046, 2827302880, 6883265229, 16163108315, 36706208439, 80814659013, 172870609803, 359984372056
(list;
graph;
refs;
listen;
history;
text;
internal format)
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