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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.

A220055 Number of tilings of a 5 X n rectangle using right trominoes and 1 X 1 tiles.

Table of values

n a(n)
0 1
1 1
2 87
3 849
4 16839
5 249651
6 4134881
7 65564239
8 1057354073
9 16939662301
10 272086395449
11 4365892578855
12 70082433262847
13 1124809701807527
14 18054055051423891
15 289774657566172859
16 4651038841674376909
17 74651407535212480809
18 1198192596525147061411

List of values

[1, 1, 87, 849, 16839, 249651, 4134881, 65564239, 1057354073, 16939662301, 272086395449, 4365892578855, 70082433262847, 1124809701807527, 18054055051423891, 289774657566172859, 4651038841674376909, 74651407535212480809, 1198192596525147061411]

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

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