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 | 14 |
| 2 | 104 |
| 3 | 546 |
| 4 | 2275 |
| 5 | 8008 |
| 6 | 24752 |
| 7 | 68952 |
| 8 | 176358 |
| 9 | 419900 |
| 10 | 940576 |
| 11 | 1998724 |
| 12 | 4056234 |
| 13 | 7904456 |
| 14 | 14858000 |
| 15 | 27041560 |
| 16 | 47805615 |
| 17 | 82317690 |
| 18 | 138389160 |
| 19 | 227613750 |
| 20 | 366913365 |
| 21 | 580610160 |
| 22 | 903171360 |
| 23 | 1382805840 |
| 24 | 2086129500 |
| 25 | 3104160696 |
| 26 | 4559958144 |
| 27 | 6618272584 |