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1, 10, 80, 610, 4625, 35322, 272800, 2132310, 16861455, 134781350, 1088074064, 8863227100, 72789560025, 602232150810, 5016320750400, 42041168169712, 354326295908580, 3001705818071400, 25549873091193600, 218426240780417250, 1874878554813727815, 16153461053030605590
(list;
graph;
refs;
listen;
history;
text;
internal format)
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