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) |
|---|---|
| 0 | 1 |
| 1 | 9 |
| 2 | 89 |
| 3 | 425 |
| 4 | 1281 |
| 5 | 3121 |
| 6 | 6577 |
| 7 | 11833 |
| 8 | 20185 |
| 9 | 32633 |
| 10 | 49689 |
| 11 | 72465 |
| 12 | 102353 |
| 13 | 140945 |
| 14 | 190121 |
| 15 | 250553 |
| 16 | 323721 |
| 17 | 411913 |
| 18 | 519025 |
| 19 | 643441 |
| 20 | 789905 |
| 21 | 961721 |
| 22 | 1156217 |
| 23 | 1380729 |
| 24 | 1638241 |
| 25 | 1927297 |
| 26 | 2257281 |
| 27 | 2624417 |
| 28 | 3035033 |
| 29 | 3490601 |
| 30 | 4000425 |