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1, 3, 7, 16, 40, 99, 249, 622, 1559, 3907, 9793, 24547, 61529, 154231, 386598, 969057, 2429064, 6088761, 15262259, 38256810, 95895601, 240374624, 602529829, 1510318306, 3785806568, 9489609785, 23786924201, 59624976769, 149457652642, 374634777973
(list;
graph;
refs;
listen;
history;
text;
internal format)
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