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 | 4 |
| 2 | 53 |
| 3 | 582 |
| 4 | 3391 |
| 5 | 12800 |
| 6 | 35601 |
| 7 | 87130 |
| 8 | 183851 |
| 9 | 359412 |
| 10 | 652093 |
| 11 | 1089014 |
| 12 | 1772943 |
| 13 | 2791024 |
| 14 | 4214273 |
| 15 | 6250602 |
| 16 | 8871763 |
| 17 | 12402404 |
| 18 | 16994853 |
| 19 | 22933822 |
| 20 | 30446903 |
| 21 | 39951792 |
| 22 | 51930313 |
| 23 | 66393122 |
| 24 | 84125643 |
| 25 | 105627412 |
| 26 | 131140013 |
| 27 | 161599374 |