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.

A351160 Number of polyominoes of 2n cells with both diagonal symmetries, for which the 180-degree rotational symmetry has an axis that coincides with a vertex of a square, but without 90-degree rotational symmetry.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 1
6 2
7 4
8 10
9 14
10 37
11 55
12 142
13 208
14 531
15 792
16 2015
17 3029
18 7621

List of values

[0, 0, 0, 1, 1, 2, 4, 10, 14, 37, 55, 142, 208, 531, 792, 2015, 3029, 7621]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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