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.

A059680 Triangle T(n,k) read by rows giving number of fixed 4 X k polyominoes with n cells (n >= 4, 1<=k<=n-3).

Table of values

n a(n)
4 1
5 0
6 12
7 0
8 18
9 50
10 0
11 8
12 154
13 120
14 0
15 1
16 212
17 584
18 230
19 0
20 0
21 158
22 1396
23 1526
24 388
25 0
26 0
27 62
28 2038
29 5154
30 3276
31 602
32 0
33 0
34 12
35 1952
36 11328
37 14192
38 6194
39 880
40 0
41 0
42 1
43 1232
44 17598
45 41196
46 32824
47 10704
48 1230
49 0
50 0
51 0
52 488
53 19912
54 87980
55 117616
56 67284
57 17294
58 1660

List of values

[1, 0, 12, 0, 18, 50, 0, 8, 154, 120, 0, 1, 212, 584, 230, 0, 0, 158, 1396, 1526, 388, 0, 0, 62, 2038, 5154, 3276, 602, 0, 0, 12, 1952, 11328, 14192, 6194, 880, 0, 0, 1, 1232, 17598, 41196, 32824, 10704, 1230, 0, 0, 0, 488, 19912, 87980, 117616, 67284, 17294, 1660]