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 | 3 |
| 3 | 8 |
| 4 | 24 |
| 5 | 71 |
| 6 | 209 |
| 7 | 612 |
| 8 | 1784 |
| 9 | 5189 |
| 10 | 15081 |
| 11 | 43838 |
| 12 | 127528 |
| 13 | 371395 |
| 14 | 1082951 |
| 15 | 3161866 |
| 16 | 9243400 |
| 17 | 27055153 |
| 18 | 79280601 |
| 19 | 232567194 |
| 20 | 682905120 |
| 21 | 2007104343 |
| 22 | 5904004451 |
| 23 | 17380510458 |
| 24 | 51202600920 |
| 25 | 150942696637 |
| 26 | 445247984543 |