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 | 2 |
| 3 | 3 |
| 4 | 9 |
| 5 | 19 |
| 6 | 25 |
| 7 | 37 |
| 8 | 77 |
| 9 | 163 |
| 10 | 193 |
| 11 | 1119 |
| 12 | 1155 |
| 13 | 4065 |
| 14 | 4229 |
| 15 | 4649 |
| 16 | 7847 |
| 17 | 13325 |
| 18 | 34175 |
| 19 | 59739 |
| 20 | 78901 |
| 21 | 636731 |
| 22 | 1122603 |
| 23 | 1301535 |
| 24 | 2263913 |
| 25 | 5947165 |
| 26 | 72511173 |
| 27 | 78641579 |
| 28 | 125121851 |
| 29 | 198424189 |
| 30 | 4488817391 |