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) |
|---|---|
| 5 | 1 |
| 6 | 9 |
| 7 | 52 |
| 8 | 247 |
| 9 | 1053 |
| 10 | 4199 |
| 11 | 16017 |
| 12 | 59224 |
| 13 | 214058 |
| 14 | 760487 |
| 15 | 2665884 |
| 16 | 9246276 |
| 17 | 31793724 |
| 18 | 108548332 |
| 19 | 368400045 |
| 20 | 1244027317 |
| 21 | 4182854728 |
| 22 | 14012220027 |
| 23 | 46789129817 |
| 24 | 155798575851 |
| 25 | 517500496981 |
| 26 | 1715190689420 |
| 27 | 5673820630478 |
| 28 | 18736674281091 |
| 29 | 61779282616728 |