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 | 1 |
| 2 | 14 |
| 3 | 37 |
| 4 | 719 |
| 5 | 5056 |
| 6 | 151513 |
| 7 | 1759463 |
| 8 | 68163191 |
| 9 | 352149277 |
| 10 | 360867217 |
| 11 | 15078888947 |
| 12 | 1546201093747 |
| 13 | 95491548878617 |
| 14 | 10736398220663 |
| 15 | 1400899861968427 |
| 16 | 41036431877859203 |
| 17 | 41386424246755373 |
| 18 | 8212624279323157381 |
| 19 | 256265816149636840711 |
| 20 | 29139716513641120366493 |