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A032161 Number of rooted compound windmills with n nodes and leaves of 2 colors where any 2 submills extending from the same node are different. 0
2, 2, 3, 7, 18, 48, 145, 444, 1393, 4507, 14759, 49142, 165317, 562091, 1925899, 6647608, 23092972, 80660663, 283138682, 998248096, 3533524793, 12552572322, 44737515682, 159919954982, 573214555207, 2059779884427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

Index entries for sequences related to mobiles

FORMULA

Shifts left under "CGK" (necklace, element, unlabeled) transform.

CROSSREFS

Sequence in context: A128776 A117387 A113842 * A265801 A098738 A291742

Adjacent sequences:  A032158 A032159 A032160 * A032162 A032163 A032164

KEYWORD

nonn

AUTHOR

Christian G. Bower

STATUS

approved

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Last modified February 21 14:29 EST 2018. Contains 299414 sequences. (Running on oeis4.)