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 | 9699690 |
| 2 | 111546435 |
| 3 | 1078282205 |
| 4 | 6685349671 |
| 5 | 35336848261 |
| 6 | 131710070791 |
| 7 | 435656388001 |
| 8 | 1204461778591 |
| 9 | 3359814435017 |
| 10 | 8618654420261 |
| 11 | 18128893780549 |
| 12 | 39181802686993 |
| 13 | 75186702453419 |
| 14 | 133869006807307 |
| 15 | 245945384599471 |