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A330211
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Number of free pentagonal polyforms with n cells on the order-4 pentagonal tiling of the hyperbolic plane.
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0
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1, 1, 1, 2, 8, 28, 143, 747, 4346, 25974, 160869, 1015723, 6531611, 42592880
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OFFSET
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0,4
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COMMENTS
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The order-4 pentagonal tiling of the hyperbolic plane has Schläfli symbol {5,4}.
This sequence is computed from via program by Christian Sievers in the Code Golf Stack Exchange link.
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LINKS
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PROG
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Several programs are available via the Code Golf link.
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CROSSREFS
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Analogs with different Schläfli symbols are A000105 ({4,4}), A000207 ({3,oo}), A000228 ({6,3}), A000577 ({3,6}), A005036 ({4,oo}), A119611 ({4,5}), A330659 ({3,7}), A332930 ({4,6}), and A333018 ({7,3}).
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KEYWORD
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nonn,hard,more
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AUTHOR
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EXTENSIONS
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a(8)-a(13) from Ed Wynn, Feb 16 2021
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STATUS
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approved
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