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.

A293007 Expansion of 2*x^2 / (1-2*x-2*x^2).

Table of values

n a(n)
0 0
1 0
2 2
3 4
4 12
5 32
6 88
7 240
8 656
9 1792
10 4896
11 13376
12 36544
13 99840
14 272768
15 745216
16 2035968
17 5562368
18 15196672
19 41518080
20 113429504
21 309895168
22 846649344
23 2313089024
24 6319476736
25 17265131520
26 47169216512
27 128868696064
28 352075825152
29 961889042432

List of values

[0, 0, 2, 4, 12, 32, 88, 240, 656, 1792, 4896, 13376, 36544, 99840, 272768, 745216, 2035968, 5562368, 15196672, 41518080, 113429504, 309895168, 846649344, 2313089024, 6319476736, 17265131520, 47169216512, 128868696064, 352075825152, 961889042432]