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 | 3 |
| 2 | 7 |
| 3 | 22 |
| 4 | 109 |
| 5 | 753 |
| 6 | 6374 |
| 7 | 62205 |
| 8 | 676983 |
| 9 | 8026548 |
| 10 | 101907085 |
| 11 | 1368004992 |
| 12 | 19233435438 |
| 13 | 281169127711 |
| 14 | 4249797119751 |
| 15 | 66116288446463 |