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) |
|---|---|
| 3 | 312 |
| 4 | 1531 |
| 5 | 7298 |
| 6 | 35205 |
| 7 | 174268 |
| 8 | 885719 |
| 9 | 4601982 |
| 10 | 24306577 |
| 11 | 129851384 |
| 12 | 698930787 |
| 13 | 3780126106 |
| 14 | 20505863069 |
| 15 | 111441343860 |
| 16 | 606312668335 |
| 17 | 3300926292470 |
| 18 | 17978225967081 |
| 19 | 97939845566896 |
| 20 | 533619551723963 |
| 21 | 2907629293865874 |
| 22 | 15844069824657013 |
| 23 | 86338863686763692 |
| 24 | 470492593924667271 |