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 | 7 |
| 3 | 27 |
| 4 | 96 |
| 5 | 315 |
| 6 | 994 |
| 7 | 3043 |
| 8 | 9123 |
| 9 | 26909 |
| 10 | 78370 |
| 11 | 225911 |
| 12 | 645732 |
| 13 | 1832677 |
| 14 | 5170111 |
| 15 | 14509695 |
| 16 | 40537284 |
| 17 | 112805043 |
| 18 | 312808198 |
| 19 | 864707719 |
| 20 | 2383649115 |
| 21 | 6554153921 |
| 22 | 17980221382 |
| 23 | 49222822127 |
| 24 | 134495771976 |
| 25 | 366850762825 |