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 | 15 |
| 2 | 35 |
| 3 | 77 |
| 4 | 221 |
| 5 | 899 |
| 6 | 1517 |
| 7 | 2021 |
| 8 | 5183 |
| 9 | 8633 |
| 10 | 11663 |
| 11 | 23707 |
| 12 | 27221 |
| 13 | 36863 |
| 14 | 41989 |
| 15 | 47053 |
| 16 | 57599 |
| 17 | 60491 |
| 18 | 77837 |
| 19 | 111547 |
| 20 | 164009 |
| 21 | 233273 |
| 22 | 324899 |
| 23 | 372091 |
| 24 | 416021 |
| 25 | 471953 |
| 26 | 522713 |
| 27 | 568507 |
| 28 | 608351 |
| 29 | 665831 |
| 30 | 680621 |