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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 6 |
| 5 | 66 |
| 6 | 66 |
| 7 | 858 |
| 8 | 858 |
| 9 | 429 |
| 10 | 572 |
| 11 | 9724 |
| 12 | 2652 |
| 13 | 50388 |
| 14 | 3876 |
| 15 | 3876 |
| 16 | 42636 |
| 17 | 245157 |
| 18 | 28842 |
| 19 | 48070 |
| 20 | 32890 |
| 21 | 296010 |
| 22 | 296010 |
| 23 | 780390 |
| 24 | 33930 |
| 25 | 525915 |
| 26 | 841464 |
| 27 | 712008 |
| 28 | 1344904 |
| 29 | 1344904 |
| 30 | 139128 |