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 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 14 |
| 6 | 99 |
| 7 | 507 |
| 8 | 5112 |
| 9 | 9361 |
| 10 | 13451 |
| 11 | 90425 |
| 12 | 132640 |
| 13 | 268883 |
| 14 | 462518 |
| 15 | 1803181 |
| 16 | 1890795 |
| 17 | 2053555 |
| 18 | 3831113 |
| 19 | 4166332 |
| 20 | 5759263 |
| 21 | 38574916 |
| 22 | 45164470 |
| 23 | 310321816 |
| 24 | 530684437 |