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 | 5 |
| 2 | 31 |
| 3 | 8123 |
| 4 | 45439 |
| 5 | 156157 |
| 6 | 480209 |
| 7 | 2181737 |
| 8 | 6012899 |
| 9 | 13626257 |
| 10 | 60487759 |
| 11 | 217795247 |
| 12 | 240485257 |
| 13 | 995151679 |
| 14 | 4002927023 |
| 15 | 7186211917 |
| 16 | 10514388763 |
| 17 | 18553663237 |
| 18 | 34434090797 |
| 19 | 196122821897 |