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 | 5 |
| 4 | 15 |
| 5 | 20 |
| 6 | 124 |
| 7 | 141 |
| 8 | 1085 |
| 9 | 1221 |
| 10 | 5267 |
| 11 | 9814 |
| 12 | 9899 |
| 13 | 179888 |
| 14 | 531293 |
| 15 | 43914936 |
| 16 | 59108249 |
| 17 | 129482155 |
| 18 | 290253117 |
| 19 | 297264974 |
| 20 | 329981693 |
| 21 | 515700524 |
| 22 | 1791622856 |
| 23 | 29237782307 |
| 24 | 289017844013 |
| 25 | 2187297805011 |
| 26 | 20282473409970 |