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A001678 Number of series-reduced planted trees with n nodes.
(Formerly M0768 N0293)
+0
7
0, 0, 1, 0, 1, 1, 2, 3, 6, 10, 19, 35, 67, 127, 248, 482, 952, 1885, 3765, 7546, 15221, 30802, 62620, 127702, 261335, 536278, 1103600, 2276499, 4706985, 9752585, 20247033, 42110393, 87733197, 183074638, 382599946, 800701320, 1677922740, 3520581954 (list; graph; listen)
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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