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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.

A372221 Number of tilings of a 5 X n rectangle using n pentominoes of shapes T, W, I, X.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 2
6 3
7 6
8 9
9 12
10 16
11 21
12 41
13 66
14 106
15 156
16 219
17 364
18 558
19 930
20 1444
21 2191
22 3515
23 5361
24 8737
25 13661
26 21478
27 34397
28 53528
29 86137
30 135294
31 215432
32 345081
33 546705
34 879212
35 1395476
36 2239086
37 3596427
38 5767656
39 9312008
40 14949738
41 24163742
42 39045229

List of values

[1, 1, 1, 1, 1, 2, 3, 6, 9, 12, 16, 21, 41, 66, 106, 156, 219, 364, 558, 930, 1444, 2191, 3515, 5361, 8737, 13661, 21478, 34397, 53528, 86137, 135294, 215432, 345081, 546705, 879212, 1395476, 2239086, 3596427, 5767656, 9312008, 14949738, 24163742, 39045229]

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

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