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) |
|---|---|
| 5 | 1 |
| 6 | 17 |
| 7 | 184 |
| 8 | 1641 |
| 9 | 13276 |
| 10 | 102244 |
| 11 | 770989 |
| 12 | 5795889 |
| 13 | 43967302 |
| 14 | 339403001 |
| 15 | 2681449074 |
| 16 | 21763977864 |
| 17 | 181900742989 |
| 18 | 1567473197429 |
| 19 | 13932812925824 |
| 20 | 127738400615689 |
| 21 | 1207445992487256 |
| 22 | 11759938209394472 |
| 23 | 117926100082535985 |
| 24 | 1216563820893322317 |
| 25 | 12901060857158377838 |