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) |
|---|---|
| 0 | 7 |
| 1 | 43 |
| 2 | 295 |
| 3 | 2059 |
| 4 | 14407 |
| 5 | 100843 |
| 6 | 705895 |
| 7 | 4941259 |
| 8 | 34588807 |
| 9 | 242121643 |
| 10 | 1694851495 |
| 11 | 11863960459 |
| 12 | 83047723207 |
| 13 | 581334062443 |
| 14 | 4069338437095 |
| 15 | 28485369059659 |
| 16 | 199397583417607 |
| 17 | 1395783083923243 |
| 18 | 9770481587462695 |
| 19 | 68393371112238859 |