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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.

A251617 Number of tilings of a 5 X n rectangle using n pentominoes of shapes F, I, L, U.

Table of values

n a(n)
0 1
1 1
2 3
3 5
4 19
5 74
6 219
7 628
8 1749
9 5486
10 17448
11 53383
12 160169
13 479908
14 1468366
15 4512092
16 13782535
17 41855766
18 127112554
19 387469920
20 1182800866
21 3606789463
22 10983721059
23 33445214911
24 101911804705
25 310658892951
26 946813182854
27 2884825285301
28 8789233684468

List of values

[1, 1, 3, 5, 19, 74, 219, 628, 1749, 5486, 17448, 53383, 160169, 479908, 1468366, 4512092, 13782535, 41855766, 127112554, 387469920, 1182800866, 3606789463, 10983721059, 33445214911, 101911804705, 310658892951, 946813182854, 2884825285301, 8789233684468]

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

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