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) |
|---|---|
| 3 | 1 |
| 4 | 10 |
| 5 | 34 |
| 6 | 206 |
| 7 | 1351 |
| 8 | 10543 |
| 9 | 92708 |
| 10 | 912884 |
| 11 | 9917445 |
| 12 | 117838808 |
| 13 | 1519483258 |
| 14 | 21128310078 |
| 15 | 315093762147 |
| 16 | 5016410089130 |
| 17 | 84909414423784 |
| 18 | 1522548805068310 |
| 19 | 28830824064870329 |
| 20 | 574880701875755325 |
| 21 | 12039866150973004846 |
| 22 | 264230694283295736788 |
| 23 | 6063848537910027941323 |