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.
n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 9 |
4 | 33 |
5 | 145 |
6 | 715 |
7 | 3801 |
8 | 21889 |
9 | 140001 |
10 | 974803 |
11 | 6947017 |
12 | 50720417 |
13 | 421135793 |
14 | 3950147227 |
15 | 33562929817 |
16 | 240061039105 |
17 | 2672302901185 |
18 | 45695167547043 |
19 | 388308372326665 |
20 | -1858226878271967 |
21 | 9709607588675537 |