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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.

A354132 Number of tilings of a 3 X n rectangle using 2 X 2 and 1 X 1 tiles, right trominoes and dominoes.

Table of values

n a(n)
0 1
1 3
2 48
3 405
4 4185
5 40320
6 397755
7 3892293
8 38193444
9 374425263
10 3671810235
11 36003770640
12 353046480345
13 3461866214283
14 33946152068808
15 332866572321933
16 3263999126947497
17 32005882711563552
18 313840950402409011
19 3077438640586986141
20 30176522977460549436

List of values

[1, 3, 48, 405, 4185, 40320, 397755, 3892293, 38193444, 374425263, 3671810235, 36003770640, 353046480345, 3461866214283, 33946152068808, 332866572321933, 3263999126947497, 32005882711563552, 313840950402409011, 3077438640586986141, 30176522977460549436]

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

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