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A032172 Number of rooted compound windmills with n nodes and leaves of 2 colors with no symmetries. 0
2, 2, 3, 9, 27, 93, 317, 1148, 4203, 15781, 60066, 231968, 905301, 3567982, 14175319, 56722193, 228380002, 924598874, 3761536993, 15370095298, 63051505041, 259573763572, 1072091242996, 4441058718736 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..24.

Index entries for sequences related to mobiles

FORMULA

Shifts left under "CHK" (necklace, identity, unlabeled) transform.

CROSSREFS

Sequence in context: A275329 A021821 A019234 * A032103 A091044 A079661

Adjacent sequences:  A032169 A032170 A032171 * A032173 A032174 A032175

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 19 08:27 EST 2018. Contains 299330 sequences. (Running on oeis4.)