cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A330211 Number of free pentagonal polyforms with n cells on the order-4 pentagonal tiling of the hyperbolic plane.

Original entry on oeis.org

1, 1, 1, 2, 8, 28, 143, 747, 4346, 25974, 160869, 1015723, 6531611, 42592880
Offset: 0

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Author

Peter Kagey, Mar 05 2020

Keywords

Comments

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.

Links

Crossrefs

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}).

Programs

  • C
    // See the Code Golf link.
  • GAP
    # See the Code Golf link.
  • bc
    # See the Code Golf link.

Extensions

a(8)-a(13) from Ed Wynn, Feb 16 2021
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