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) |
|---|---|
| 6 | 5 |
| 7 | 20 |
| 8 | 100 |
| 9 | 431 |
| 10 | 1937 |
| 11 | 8548 |
| 12 | 38199 |
| 13 | 171001 |
| 14 | 770934 |
| 15 | 3492251 |
| 16 | 15905897 |
| 17 | 72785480 |
| 18 | 334571647 |
| 19 | 1544203452 |
| 20 | 7154247842 |
| 21 | 33260560977 |
| 22 | 155126129968 |
| 23 | 725639264293 |
| 24 | 3403612632885 |
| 25 | 16004969728270 |
| 26 | 75437244856898 |
| 27 | 356337397010035 |
| 28 | 1686618801843050 |