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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.

A247117 Number of tilings of a 10 X n rectangle using 2n pentominoes of shape I.

Table of values

n a(n)
0 1
1 1
2 1
3 1
4 1
5 8
6 17
7 28
8 41
9 56
10 144
11 317
12 609
13 1060
14 1716
15 3324
16 6713
17 13188
18 24624
19 43620
20 80464
21 153645
22 296025
23 562097
24 1037921
25 1920661
26 3600832
27 6820873
28 12920804
29 24211457
30 45173688
31 84493668
32 158848825
33 299451277
34 562923960
35 1055117520
36 1976475968

List of values

[1, 1, 1, 1, 1, 8, 17, 28, 41, 56, 144, 317, 609, 1060, 1716, 3324, 6713, 13188, 24624, 43620, 80464, 153645, 296025, 562097, 1037921, 1920661, 3600832, 6820873, 12920804, 24211457, 45173688, 84493668, 158848825, 299451277, 562923960, 1055117520, 1976475968]

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

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