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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.

A247268 Number of tilings of a 5 X n rectangle using n pentominoes of shapes Y, U, X.

Table of values

n a(n)
0 1
1 0
2 0
3 1
4 0
5 2
6 1
7 0
8 4
9 5
10 38
11 22
12 13
13 90
14 144
15 457
16 408
17 386
18 1267
19 2230
20 5912
21 6481
22 7098
23 18896
24 35433
25 79634
26 101232
27 127501
28 288304
29 546652
30 1113907
31 1560356
32 2148298
33 4408181
34 8335234
35 15954116
36 23827541
37 35011426
38 67591204
39 126376945
40 232719926

List of values

[1, 0, 0, 1, 0, 2, 1, 0, 4, 5, 38, 22, 13, 90, 144, 457, 408, 386, 1267, 2230, 5912, 6481, 7098, 18896, 35433, 79634, 101232, 127501, 288304, 546652, 1113907, 1560356, 2148298, 4408181, 8335234, 15954116, 23827541, 35011426, 67591204, 126376945, 232719926]

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

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