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 | 10 |
| 2 | 15 |
| 3 | 50 |
| 4 | 370 |
| 5 | 2418 |
| 6 | 4371 |
| 7 | 5341 |
| 8 | 8430 |
| 9 | 20535 |
| 10 | 25338 |
| 11 | 26958 |
| 12 | 278674 |
| 13 | 1194649 |
| 14 | 4304445 |
| 15 | 11984885 |
| 16 | 12327121 |
| 17 | 20746461 |
| 18 | 27585010 |
| 19 | 72363853 |
| 20 | 79501818 |