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 | 8 |
| 2 | 44 |
| 3 | 200 |
| 4 | 806 |
| 5 | 2984 |
| 6 | 10364 |
| 7 | 34232 |
| 8 | 108545 |
| 9 | 332688 |
| 10 | 990736 |
| 11 | 2878144 |
| 12 | 8182432 |
| 13 | 22823680 |
| 14 | 62595328 |
| 15 | 169090048 |
| 16 | 450568960 |
| 17 | 1185832960 |
| 18 | 3085885440 |
| 19 | 7947714560 |
| 20 | 20275478528 |
| 21 | 51272351744 |
| 22 | 128605356032 |
| 23 | 320145981440 |
| 24 | 791358537728 |
| 25 | 1943278714880 |
| 26 | 4742573981696 |