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 | 15 |
| 2 | 3 |
| 3 | 51 |
| 4 | 1563 |
| 5 | 211 |
| 6 | 1123 |
| 7 | 15511 |
| 8 | 5487 |
| 9 | 37195 |
| 10 | 108963 |
| 11 | 331527 |
| 12 | 1493103 |
| 13 | 1103307 |
| 14 | 3248367 |
| 15 | 46574499 |
| 16 | 4814875 |
| 17 | 14747343 |
| 18 | 222808263 |
| 19 | 446500987 |
| 20 | 46936231 |
| 21 | 228462727 |
| 22 | 1003298383 |
| 23 | 1705601667 |