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 | 3 |
| 2 | 4 |
| 3 | 23 |
| 4 | 27 |
| 5 | 50 |
| 6 | 227 |
| 7 | 277 |
| 8 | 504 |
| 9 | 4309 |
| 10 | 4813 |
| 11 | 71691 |
| 12 | 76504 |
| 13 | 836731 |
| 14 | 1749966 |
| 15 | 2586697 |
| 16 | 12096754 |
| 17 | 147747745 |
| 18 | 307592244 |
| 19 | 1070524477 |
| 20 | 2448641198 |
| 21 | 3519165675 |
| 22 | 13006138223 |
| 23 | 55543718567 |
| 24 | 68549856790 |
| 25 | 124093575357 |
| 26 | 316737007504 |