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 | 2 |
| 3 | 4 |
| 4 | 6 |
| 5 | 72 |
| 6 | 75 |
| 7 | 152 |
| 8 | 518 |
| 9 | 631 |
| 10 | 1585 |
| 11 | 2512 |
| 12 | 4217 |
| 13 | 5275 |
| 14 | 13895 |
| 15 | 14678 |
| 16 | 53367 |
| 17 | 177828 |
| 18 | 464159 |
| 19 | 1154782 |
| 20 | 2154435 |
| 21 | 3162278 |
| 22 | 4641589 |
| 23 | 8483429 |
| 24 | 8576959 |
| 25 | 13894955 |
| 26 | 15848932 |
| 27 | 21544347 |
| 28 | 68129207 |
| 29 | 74989421 |
| 30 | 100000001 |
| 31 | 114504757 |
| 32 | 170125428 |
| 33 | 517947468 |
| 34 | 1000000001 |