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 | 2 |
| 2 | 11 |
| 3 | 12 |
| 4 | 13 |
| 5 | 53 |
| 6 | 348 |
| 7 | 5263 |
| 8 | 9960 |
| 9 | 17040 |
| 10 | 33193 |
| 11 | 72960 |
| 12 | 125350 |
| 13 | 663179 |
| 14 | 1096815 |
| 15 | 3481893 |
| 16 | 4802237 |
| 17 | 7782503 |
| 18 | 9659740 |
| 19 | 279957736 |
| 20 | 454935116 |
| 21 | 460488754 |
| 22 | 1710020367 |
| 23 | 51367039980 |
| 24 | 55286622194 |
| 25 | 323648965384 |
| 26 | 2061149370731 |