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) |
|---|---|
| 1 | 8 |
| 2 | 20 |
| 3 | 57 |
| 4 | 167 |
| 5 | 569 |
| 6 | 1832 |
| 7 | 5693 |
| 8 | 19241 |
| 9 | 72004 |
| 10 | 251434 |
| 11 | 817685 |
| 12 | 2912603 |
| 13 | 11464927 |
| 14 | 41520649 |
| 15 | 137255398 |
| 16 | 502535651 |
| 17 | 2038965137 |
| 18 | 7539964485 |
| 19 | 25351037019 |
| 20 | 94403539934 |
| 21 | 389919393256 |
| 22 | 1461664899103 |
| 23 | 4982806264910 |
| 24 | 18769209002168 |