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 | 22 |
| 4 | 95 |
| 5 | 413 |
| 6 | 1823 |
| 7 | 8196 |
| 8 | 37568 |
| 9 | 175542 |
| 10 | 835526 |
| 11 | 4046264 |
| 12 | 19909703 |
| 13 | 99391155 |
| 14 | 502637329 |
| 15 | 2571355930 |
| 16 | 13288938738 |
| 17 | 69296856372 |
| 18 | 364220714252 |
| 19 | 1927675740374 |
| 20 | 10265166063864 |
| 21 | 54960921754824 |
| 22 | 295688640900428 |