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 | 3 |
| 2 | 11 |
| 3 | 11 |
| 4 | 11 |
| 5 | 11 |
| 6 | 11 |
| 7 | 451 |
| 8 | 645 |
| 9 | 645 |
| 10 | 645 |
| 11 | 5212 |
| 12 | 18123 |
| 13 | 18123 |
| 14 | 58276 |
| 15 | 58276 |
| 16 | 80697 |
| 17 | 80697 |
| 18 | 80697 |
| 19 | 1146746 |
| 20 | 1962901 |
| 21 | 3296306 |
| 22 | 9772065 |
| 23 | 9772065 |
| 24 | 9772065 |
| 25 | 47536571 |
| 26 | 169338693 |
| 27 | 169338693 |
| 28 | 207861698 |
| 29 | 207861698 |
| 30 | 207861698 |