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 | 1 |
| 1 | 6 |
| 2 | 46 |
| 3 | 212 |
| 4 | 738 |
| 5 | 2104 |
| 6 | 5150 |
| 7 | 11196 |
| 8 | 22162 |
| 9 | 40688 |
| 10 | 70254 |
| 11 | 115300 |
| 12 | 181346 |
| 13 | 275112 |
| 14 | 404638 |
| 15 | 579404 |
| 16 | 810450 |
| 17 | 1110496 |
| 18 | 1494062 |
| 19 | 1977588 |
| 20 | 2579554 |
| 21 | 3320600 |
| 22 | 4223646 |
| 23 | 5314012 |
| 24 | 6619538 |
| 25 | 8170704 |
| 26 | 10000750 |
| 27 | 12145796 |
| 28 | 14644962 |
| 29 | 17540488 |
| 30 | 20877854 |