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1, 2, 4, 7, 22, 64, 191, 567, 1689, 5033, 15013, 44809, 133816, 399802, 1194949, 3572693, 10684758, 31962456, 95633229, 286193409, 856610214, 2564317356, 7677475521, 22988860305, 68843627049, 206183053485, 617563017927, 1849887488987
(list;
graph;
refs;
listen;
history;
text;
internal format)
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