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A339770 Number of polyfetts (or polifetti) with n cells, distinguishing mirror images. 0
1, 15, 170, 2766, 46127, 811265, 14605298, 268039329 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

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.

LINKS

Table of n, a(n) for n=1..8.

George Sicherman, Catalogue of Polyfetts

EXAMPLE

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

CROSSREFS

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

Sequence in context: A036734 A201041 A201551 * A240276 A206600 A016172

Adjacent sequences:  A339767 A339768 A339769 * A339771 A339772 A339773

KEYWORD

nonn,hard,more

AUTHOR

George Sicherman, Dec 16 2020

STATUS

approved

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Last modified May 18 23:31 EDT 2022. Contains 353826 sequences. (Running on oeis4.)