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1, 2, 5, 12, 29, 70, 169, 410, 1005, 2500, 6325, 16276, 42549, 112832, 303073, 823442, 2259917, 6256610, 17451117, 48984114, 138233969, 391876318, 1115233413, 3184379758, 9118632645, 26176992668, 75311867001, 217096296680, 626898050125
(list;
graph;
refs;
listen;
history;
text;
internal format)
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