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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 17 |
| 6 | 18 |
| 7 | 22 |
| 8 | 23 |
| 9 | 33 |
| 10 | 40 |
| 11 | 55 |
| 12 | 63 |
| 13 | 83 |
| 14 | 148 |
| 15 | 271 |
| 16 | 754 |
| 17 | 1271 |
| 18 | 2397 |
| 19 | 2685 |
| 20 | 4799 |
| 21 | 5197 |
| 22 | 6216 |
| 23 | 8736 |
| 24 | 12387 |
| 25 | 12390 |
| 26 | 19701 |
| 27 | 42403 |