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 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 13 |
| 6 | 29 |
| 7 | 71 |
| 8 | 165 |
| 9 | 401 |
| 10 | 957 |
| 11 | 2315 |
| 12 | 5561 |
| 13 | 13437 |
| 14 | 32377 |
| 15 | 78191 |
| 16 | 188617 |
| 17 | 455425 |
| 18 | 1099137 |
| 19 | 2653699 |
| 20 | 6405733 |
| 21 | 15465165 |
| 22 | 37334149 |
| 23 | 90133463 |
| 24 | 217596445 |
| 25 | 525326353 |
| 26 | 1268238029 |
| 27 | 3061802411 |
| 28 | 7391815977 |
| 29 | 17845434365 |
| 30 | 43082619953 |
| 31 | 104010674271 |
| 32 | 251103812113 |