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 | 0 |
| 1 | 1 |
| 2 | 36 |
| 3 | 414 |
| 4 | 2598 |
| 5 | 11385 |
| 6 | 39303 |
| 7 | 114387 |
| 8 | 292743 |
| 9 | 677556 |
| 10 | 1446445 |
| 11 | 2889315 |
| 12 | 5459103 |
| 13 | 9838062 |
| 14 | 17022474 |
| 15 | 28428930 |
| 16 | 46025562 |
| 17 | 72491859 |
| 18 | 111410946 |
| 19 | 167498452 |
| 20 | 246872340 |
| 21 | 357368319 |
| 22 | 508905705 |
| 23 | 713908845 |
| 24 | 987789465 |
| 25 | 1349495550 |