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 | 7 |
| 2 | 35 |
| 3 | 133 |
| 4 | 434 |
| 5 | 1246 |
| 6 | 3262 |
| 7 | 7890 |
| 8 | 17913 |
| 9 | 38479 |
| 10 | 78883 |
| 11 | 155141 |
| 12 | 294280 |
| 13 | 540344 |
| 14 | 963832 |
| 15 | 1674568 |
| 16 | 2841006 |
| 17 | 4715970 |
| 18 | 7673834 |
| 19 | 12259142 |
| 20 | 19254676 |
| 21 | 29768972 |
| 22 | 45355660 |
| 23 | 68164628 |
| 24 | 101143574 |
| 25 | 148289946 |