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 | 9 |
| 3 | 55 |
| 4 | 181 |
| 5 | 215 |
| 6 | 459 |
| 7 | 1361 |
| 8 | 1417 |
| 9 | 1623 |
| 10 | 2047 |
| 11 | 2445 |
| 12 | 4685 |
| 13 | 6687 |
| 14 | 7353 |
| 15 | 7785 |
| 16 | 7925 |
| 17 | 8489 |
| 18 | 10333 |
| 19 | 10515 |
| 20 | 11179 |
| 21 | 14087 |
| 22 | 15227 |
| 23 | 15829 |