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 | 6 |
| 3 | 15 |
| 4 | 77 |
| 5 | 185 |
| 6 | 187 |
| 7 | 475 |
| 8 | 3820 |
| 9 | 4043 |
| 10 | 4090 |
| 11 | 11231 |
| 12 | 30589 |
| 13 | 57023 |
| 14 | 126815 |
| 15 | 131055 |
| 16 | 983032 |
| 17 | 983033 |
| 18 | 2617339 |
| 19 | 4046839 |
| 20 | 11534206 |
| 21 | 11534207 |
| 22 | 65011702 |
| 23 | 66777087 |
| 24 | 368279551 |
| 25 | 469745405 |
| 26 | 973061887 |
| 27 | 1064828671 |