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 | 43 |
| 3 | 337 |
| 4 | 2395 |
| 5 | 16801 |
| 6 | 117643 |
| 7 | 823537 |
| 8 | 5764795 |
| 9 | 40353601 |
| 10 | 282475243 |
| 11 | 1977326737 |
| 12 | 13841287195 |
| 13 | 96889010401 |
| 14 | 678223072843 |
| 15 | 4747561509937 |
| 16 | 33232930569595 |
| 17 | 232630513987201 |
| 18 | 1628413597910443 |
| 19 | 11398895185373137 |