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 | 239 |
| 2 | 9503 |
| 3 | 140236 |
| 4 | 1226491 |
| 5 | 7906972 |
| 6 | 41334135 |
| 7 | 183720802 |
| 8 | 715114500 |
| 9 | 2489822632 |
| 10 | 7881608430 |
| 11 | 22979660094 |
| 12 | 62362461624 |
| 13 | 158897321204 |
| 14 | 382876827441 |
| 15 | 877788083326 |
| 16 | 1924637063386 |
| 17 | 4053719944340 |
| 18 | 8232970841532 |
| 19 | 16176720454482 |