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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 50 |
| 5 | 53 |
| 6 | 103 |
| 7 | 156 |
| 8 | 2599 |
| 9 | 2755 |
| 10 | 5354 |
| 11 | 8109 |
| 12 | 135098 |
| 13 | 143207 |
| 14 | 278305 |
| 15 | 421512 |
| 16 | 7022497 |
| 17 | 7444009 |
| 18 | 14466506 |
| 19 | 21910515 |
| 20 | 365034746 |
| 21 | 386945261 |
| 22 | 751980007 |
| 23 | 1138925268 |
| 24 | 18974784295 |
| 25 | 20113709563 |
| 26 | 39088493858 |
| 27 | 59202203421 |
| 28 | 986323748594 |
| 29 | 1045525952015 |