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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 7 |
| 5 | 3 |
| 6 | 1 |
| 7 | 37 |
| 8 | 66 |
| 9 | 19 |
| 10 | 1 |
| 11 | 175 |
| 12 | 975 |
| 13 | 990 |
| 14 | 219 |
| 15 | 1 |
| 16 | 781 |
| 17 | 12090 |
| 18 | 32575 |
| 19 | 23345 |
| 20 | 4231 |
| 21 | 1 |
| 22 | 3367 |
| 23 | 135903 |
| 24 | 866550 |
| 25 | 1514610 |
| 26 | 814903 |
| 27 | 130023 |