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A000269
Number of trees with n nodes, 3 of which are labeled.
(Formerly M3014 N1220)
+0
9
3, 16, 67, 251, 888, 3023, 10038, 32722, 105228, 334836, 1056611, 3311784, 10322791, 32026810, 98974177, 304835956, 936147219, 2867586542, 8764280567, 26733395986, 81399821915, 247459136331, 751211286356, 2277496842016
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Maintained by
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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.
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