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A003612 Symmetries in unrooted 3-trees on n+1 vertices.
(Formerly M0371)
+0
1
1, 2, 2, 8, 4, 14, 21, 35, 49, 158, 191, 425, 828, 1864, 3659, 8324, 17344, 39601, 87407, 199984, 453361, 1053816, 2426228, 5672389, 13270695, 31277150, 73874375, 175419550, 417535487, 997758788, 2390172398, 5743235470, 13832781125 (list; graph; listen)
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.


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