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.

A354131 Number of tilings of a 2 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 2
2 12
3 48
4 216
5 936
6 4104
7 17928
8 78408
9 342792
10 1498824
11 6553224
12 28652616
13 125277192
14 547747272
15 2394904968
16 10471198536
17 45783025416
18 200176267464
19 875226954888
20 3826738469448
21 16731577137672
22 73155162229704
23 319854949515144
24 1398495821923656

List of values

[1, 2, 12, 48, 216, 936, 4104, 17928, 78408, 342792, 1498824, 6553224, 28652616, 125277192, 547747272, 2394904968, 10471198536, 45783025416, 200176267464, 875226954888, 3826738469448, 16731577137672, 73155162229704, 319854949515144, 1398495821923656]

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

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