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.

A346799 Number of fixed polyominoes with n cells that have a horizontal axis of symmetry that passes through the centers of cells.

Table of values

n a(n)
1 1
2 1
3 2
4 3
5 7
6 10
7 24
8 36
9 86
10 133
11 314
12 499
13 1164
14 1888
15 4366
16 7192
17 16522
18 27548
19 62954
20 106004
21 241203
22 409492
23 928376
24 1587151
25 3586999
26 6169400
27 13904736
28 24041597
29 54053950
30 93896826
31 210654990
32 367450477
33 822754494

List of values

[1, 1, 2, 3, 7, 10, 24, 36, 86, 133, 314, 499, 1164, 1888, 4366, 7192, 16522, 27548, 62954, 106004, 241203, 409492, 928376, 1587151, 3586999, 6169400, 13904736, 24041597, 54053950, 93896826, 210654990, 367450477, 822754494]

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

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