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 | 8 |
| 3 | 12 |
| 4 | 210 |
| 5 | 1430 |
| 6 | 1785 |
| 7 | 168245 |
| 8 | 409045 |
| 9 | 119629510 |
| 10 | 293493662 |
| 11 | 7454211765 |
| 12 | 8777087598279 |
| 13 | 41162302753 |
| 14 | 184604382197975454 |
| 15 | 3700467339975406 |
| 16 | 20717472096185651930 |
| 17 | 150297492924069082735 |
| 18 | 588852089711321510 |