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A290816
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Number of dissections of an n-gon into polygons with odd number of sides counted up to rotations and reflections.
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3
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1, 1, 2, 4, 8, 23, 65, 223, 757, 2824, 10559, 40994, 160734, 641420, 2584587, 10528305, 43237978, 178974779, 745814185, 3127246179, 13185588894, 55878618492, 237905685582, 1017225981255, 4366536472758, 18812074137141, 81320795918871, 352638701880227
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OFFSET
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3,3
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LINKS
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EXAMPLE
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For a(5) = 2 the dissections of a pentagon are: a dissection into 3 triangles; a dissection into one pentagon.
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MATHEMATICA
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(* See A295419 for DissectionsModDihedral *)
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PROG
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(PARI) \\ See A295419 for DissectionsModDihedral().
DissectionsModDihedral(apply(v->v%2, [1..25])) \\ Andrew Howroyd, Nov 22 2017
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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