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.

A056882 Number of n-celled polyominoes without holes, symmetric about diagonal 2.

Table of values

n a(n)
1 0
2 0
3 0
4 0
5 0
6 0
7 1
8 1
9 0
10 1
11 2
12 1
13 2
14 3
15 4
16 4
17 6
18 7
19 12
20 12
21 17
22 18
23 33
24 34
25 51
26 52
27 93
28 100
29 154
30 152
31 276
32 300
33 474
34 460
35 846
36 929
37 1491
38 1431
39 2667
40 2956

List of values

[0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 2, 1, 2, 3, 4, 4, 6, 7, 12, 12, 17, 18, 33, 34, 51, 52, 93, 100, 154, 152, 276, 300, 474, 460, 846, 929, 1491, 1431, 2667, 2956]