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1, 1, 2, 5, 13, 40, 119, 376, 1202, 3916, 12920, 42974, 143989, 485623, 1646056, 5601850, 19127858, 65491001, 224750426, 772816118, 2661800949, 9180835248, 31703037147, 109586025511, 379124973003, 1312592051481, 4547284385059, 15761969520682, 54660238286990
(list;
graph;
refs;
listen;
history;
text;
internal format)
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