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 | 5 |
| 2 | 11 |
| 3 | 191 |
| 4 | 821 |
| 5 | 2081 |
| 6 | 3461 |
| 7 | 5651 |
| 8 | 25301 |
| 9 | 34841 |
| 10 | 88811 |
| 11 | 122201 |
| 12 | 171161 |
| 13 | 301991 |
| 14 | 739391 |
| 15 | 1410971 |
| 16 | 1468631 |
| 17 | 2990831 |
| 18 | 3741161 |
| 19 | 5074871 |
| 20 | 5527001 |
| 21 | 8926451 |
| 22 | 17186591 |
| 23 | 21872441 |
| 24 | 47615831 |
| 25 | 66714671 |
| 26 | 76384661 |
| 27 | 87607361 |
| 28 | 122033201 |
| 29 | 132574061 |
| 30 | 204335771 |