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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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A339770 Number of polyfetts (or polifetti) with n cells, distinguishing mirror images.

Original entry on oeis.org

1, 15, 170, 2766, 46127, 811265, 14605298, 268039329
Offset: 1

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Author

George Sicherman, Dec 16 2020

Keywords

Comments

A polyfett [polifetto] is a generalized polyabolo [polytan]. It is formed by joining isosceles right triangles on the quadrille grid along edges and at corners.

Examples

			For n=2 there are 4 diaboloes and 11 proper difetts, distinguishing mirror images.  See the link.

Links

Crossrefs

Cf. A337867 (number of polyfetts with n cells, identifying mirror images).
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