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 | 6 |
| 4 | 10 |
| 5 | 26 |
| 6 | 90 |
| 7 | 154 |
| 8 | 410 |
| 9 | 1434 |
| 10 | 2458 |
| 11 | 6554 |
| 12 | 22938 |
| 13 | 39322 |
| 14 | 104858 |
| 15 | 367002 |
| 16 | 629146 |
| 17 | 1677722 |
| 18 | 5872026 |
| 19 | 10066330 |
| 20 | 26843546 |
| 21 | 93952410 |
| 22 | 161061274 |
| 23 | 429496730 |
| 24 | 1503238554 |
| 25 | 2576980378 |
| 26 | 6871947674 |
| 27 | 24051816858 |
| 28 | 41231686042 |
| 29 | 109951162778 |
| 30 | 384829069722 |
| 31 | 659706976666 |
| 32 | 1759218604442 |
| 33 | 6157265115546 |