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 | 2 |
| 2 | 5 |
| 3 | 17 |
| 4 | 47 |
| 5 | 127 |
| 6 | 307 |
| 7 | 709 |
| 8 | 1613 |
| 9 | 3659 |
| 10 | 8147 |
| 11 | 17851 |
| 12 | 38867 |
| 13 | 84011 |
| 14 | 180497 |
| 15 | 386083 |
| 16 | 821603 |
| 17 | 1742527 |
| 18 | 3681113 |
| 19 | 7754017 |
| 20 | 16290041 |
| 21 | 34136021 |
| 22 | 71378551 |
| 23 | 148948133 |
| 24 | 310248233 |
| 25 | 645155191 |
| 26 | 1339484149 |
| 27 | 2777105117 |
| 28 | 5750079043 |
| 29 | 11891268397 |
| 30 | 24563311217 |
| 31 | 50685770143 |