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 | 19 |
| 3 | 571 |
| 4 | 9137 |
| 5 | 41113 |
| 6 | 174763 |
| 7 | 274081 |
| 8 | 1236787 |
| 9 | 7485811 |
| 10 | 23474953 |
| 11 | 34630009 |
| 12 | 47822393 |
| 13 | 69171211 |
| 14 | 92346689 |
| 15 | 160465489 |