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0, 6, 21, 77, 212, 542, 1270, 2830, 6043, 12503, 25208, 49772, 96572, 184646, 348641, 651201, 1204908, 2211018, 4027570, 7288750, 13113415, 23468331, 41799216, 74124312, 130925112, 230408262, 404121645, 706605365, 1231946948, 2142132278
(list;
graph;
refs;
listen;
history;
text;
internal format)
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