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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.

A028247 Number of T-frame polyominoes with n cells.

Table of values

n a(n)
1 0
2 0
3 0
4 1
5 2
6 6
7 10
8 19
9 28
10 44
11 60
12 86
13 110
14 146
15 182
16 233
17 278
18 343
19 403
20 490
21 557
22 664
23 749
24 879
25 978
26 1132
27 1237
28 1435
29 1551
30 1771
31 1905
32 2168
33 2296
34 2608
35 2758
36 3101
37 3256
38 3655
39 3798
40 4274
41 4419
42 4936
43 5087
44 5670
45 5809
46 6472
47 6602
48 7339
49 7462
50 8271

List of values

[0, 0, 0, 1, 2, 6, 10, 19, 28, 44, 60, 86, 110, 146, 182, 233, 278, 343, 403, 490, 557, 664, 749, 879, 978, 1132, 1237, 1435, 1551, 1771, 1905, 2168, 2296, 2608, 2758, 3101, 3256, 3655, 3798, 4274, 4419, 4936, 5087, 5670, 5809, 6472, 6602, 7339, 7462, 8271]

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

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