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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 8 |
| 5 | 5 |
| 6 | 1 |
| 7 | 4 |
| 8 | 40 |
| 9 | 72 |
| 10 | 15 |
| 11 | 154 |
| 12 | 102 |
| 13 | 260 |
| 14 | 1428 |
| 15 | 1455 |
| 16 | 6016 |
| 17 | 10846 |
| 18 | 2844 |
| 19 | 247 |
| 20 | 3420 |
| 21 | 597 |
| 22 | 3256 |
| 23 | 38249 |
| 24 | 185040 |
| 25 | 588425 |
| 26 | 312156 |
| 27 | 240300 |
| 28 | 249165 |
| 29 | 833808 |
| 30 | 374265 |
| 31 | 2841150 |
| 32 | 842528 |
| 33 | 1049268 |
| 34 | 5656002 |
| 35 | 18480630 |
| 36 | 2844 |
| 37 | 49276415 |
| 38 | 9329228 |
| 39 | 961272 |
| 40 | 19211080 |
| 41 | 51151354 |
| 42 | 109603410 |