cp's OEIS Frontend

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.

A226351 Number of ways to tile a fixed 3 X n square grid with 1 X 1, 2 X 2, and 1 X 2 tiles.

Table of values

n a(n)
0 1
1 3
2 26
3 163
4 1125
5 7546
6 51055
7 344525
8 2326760
9 15709977
10 106079739
11 716273960
12 4836475953
13 32657123299
14 220509407586
15 1488936665619
16 10053686907525
17 67885102598386
18 458377829683919
19 3095086053853821
20 20898824215523616

List of values

[1, 3, 26, 163, 1125, 7546, 51055, 344525, 2326760, 15709977, 106079739, 716273960, 4836475953, 32657123299, 220509407586, 1488936665619, 10053686907525, 67885102598386, 458377829683919, 3095086053853821, 20898824215523616]

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

Content is available under The OEIS End-User License Agreement.