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 | 5 |
| 3 | 14 |
| 4 | 51 |
| 5 | 125 |
| 6 | 429 |
| 7 | 1039 |
| 8 | 3258 |
| 9 | 8254 |
| 10 | 23554 |
| 11 | 58934 |
| 12 | 168803 |
| 13 | 412177 |
| 14 | 1114550 |
| 15 | 2795446 |
| 16 | 7345875 |
| 17 | 18035424 |
| 18 | 46875324 |
| 19 | 114272057 |
| 20 | 291692396 |
| 21 | 709742614 |
| 22 | 1774402071 |
| 23 | 4290848175 |
| 24 | 10672950659 |
| 25 | 25572179792 |
| 26 | 62670553073 |
| 27 | 149978278320 |