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) |
|---|---|
| 0 | 1 |
| 1 | 23 |
| 2 | 387 |
| 3 | 5755 |
| 4 | 80171 |
| 5 | 1073163 |
| 6 | 13989067 |
| 7 | 178979915 |
| 8 | 2258870091 |
| 9 | 28217552203 |
| 10 | 349721737547 |
| 11 | 4307771961675 |
| 12 | 52804374651211 |
| 13 | 644763606925643 |
| 14 | 7848274394218827 |
| 15 | 95290403841737035 |
| 16 | 1154595957211955531 |