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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.

A219874 Number of tilings of an n X n square using dominoes and straight (3 X 1) trominoes.

Table of values

n a(n)
0 1
1 0
2 2
3 14
4 184
5 9612
6 1143834
7 354859954
8 295743829064
9 631206895803116
10 3541054185616706122
11 51821077154605344550820
12 1976225122734369352127065686
13 196913655491597719598898811003348
14 51179690353659852099434654264900753288
15 34716223657627061096793572212632925410608268

List of values

[1, 0, 2, 14, 184, 9612, 1143834, 354859954, 295743829064, 631206895803116, 3541054185616706122, 51821077154605344550820, 1976225122734369352127065686, 196913655491597719598898811003348, 51179690353659852099434654264900753288, 34716223657627061096793572212632925410608268]

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

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