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.

A127865 Number of square tiles in all tilings of a 2 X n board with 1 X 1 and L-shaped tiles (where the L-shaped tiles cover 3 squares).

Table of values

n a(n)
1 2
2 8
3 30
4 108
5 354
6 1152
7 3614
8 11204
9 34170
10 103176
11 308598
12 916236
13 2702834
14 7929872
15 23155182
16 67333140
17 195082218
18 563367960
19 1622185958
20 4658753564
21 13347741666
22 38160007200
23 108881256414
24 310108078116
25 881761288154

List of values

[2, 8, 30, 108, 354, 1152, 3614, 11204, 34170, 103176, 308598, 916236, 2702834, 7929872, 23155182, 67333140, 195082218, 563367960, 1622185958, 4658753564, 13347741666, 38160007200, 108881256414, 310108078116, 881761288154]

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

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