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 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 20 |
| 6 | 46 |
| 7 | 232 |
| 8 | 501 |
| 9 | 2352 |
| 10 | 24442 |
| 11 | 53243 |
| 12 | 550863 |
| 13 | 2616338 |
| 14 | 5701553 |
| 15 | 27077005 |
| 16 | 280237217 |
| 17 | 2900328380 |
| 18 | 6320545915 |
| 19 | 65414893802 |
| 20 | 310664269401 |
| 21 | 677015556295 |
| 22 | 7006815193063 |
| 23 | 33276323565116 |
| 24 | 344395408399372 |
| 25 | 7767597342090622 |
| 26 | 36889382062795742 |