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1, 3, 8, 22, 55, 143, 349, 885, 2138, 5356, 12890, 32092, 77178, 191530, 460934, 1141888, 2751551, 6809421, 16431189, 40633227, 98175341, 242626935, 586867463, 1449457735, 3509084995, 8661201115, 20982916461, 51755457003
(list;
graph;
refs;
listen;
history;
text;
internal format)
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