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 | 148 |
| 4 | 253 |
| 5 | 330 |
| 6 | 2380 |
| 7 | 2124 |
| 8 | 30598 |
| 9 | 22791 |
| 10 | 238582 |
| 11 | 107187 |
| 12 | 1521134 |
| 13 | 10363119 |
| 14 | 9995030 |
| 15 | 68353787 |