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 | 4 |
| 2 | 36 |
| 3 | 121 |
| 4 | 484 |
| 5 | 2809 |
| 6 | 11236 |
| 7 | 6889 |
| 8 | 27556 |
| 9 | 29929 |
| 10 | 51529 |
| 11 | 85849 |
| 12 | 744769 |
| 13 | 196249 |
| 14 | 734449 |
| 15 | 727609 |
| 16 | 942841 |
| 17 | 1203409 |
| 18 | 4813636 |
| 19 | 1510441 |
| 20 | 1885129 |
| 21 | 7540516 |
| 22 | 8048569 |
| 23 | 4932841 |
| 24 | 4108729 |
| 25 | 7946761 |
| 26 | 12243001 |
| 27 | 18088009 |
| 28 | 10608049 |
| 29 | 12187081 |
| 30 | 10569001 |