12, 60, 210, 630, 1736, 4536, 11430, 28050, 67452, 159588, 372554, 859950, 1965840, 4456176, 10026702, 22412970, 49806980, 110100060, 242220594, 520578950, 1157627352, 2516581800, 5452594550, 11777604930, 25367149836, 54492396756
Thursday, 27 June 2013
OEIS Sequence of the Week [July 1, 2013]
A000554: Number of labeled trees of diameter 3 with 
nodes:
12, 60, 210, 630, 1736, 4536, 11430, 28050, 67452, 159588, 372554, 859950, 1965840, 4456176, 10026702, 22412970, 49806980, 110100060, 242220594, 520578950, 1157627352, 2516581800, 5452594550, 11777604930, 25367149836, 54492396756
12, 60, 210, 630, 1736, 4536, 11430, 28050, 67452, 159588, 372554, 859950, 1965840, 4456176, 10026702, 22412970, 49806980, 110100060, 242220594, 520578950, 1157627352, 2516581800, 5452594550, 11777604930, 25367149836, 54492396756
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