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 | 4 |
| 2 | 110 |
| 3 | 506 |
| 4 | 550 |
| 5 | 1830 |
| 6 | 2162 |
| 7 | 2750 |
| 8 | 3422 |
| 9 | 4114 |
| 10 | 4746 |
| 11 | 5490 |
| 12 | 5566 |
| 13 | 6806 |
| 14 | 7782 |
| 15 | 9150 |
| 16 | 11342 |
| 17 | 13750 |
| 18 | 14238 |
| 19 | 16470 |
| 20 | 16762 |
| 21 | 23346 |
| 22 | 27450 |
| 23 | 27722 |
| 24 | 31862 |
| 25 | 33222 |
| 26 | 42714 |
| 27 | 43378 |
| 28 | 45254 |
| 29 | 45750 |
| 30 | 49410 |
| 31 | 49726 |
| 32 | 51302 |
| 33 | 61226 |
| 34 | 68750 |
| 35 | 68906 |
| 36 | 70038 |
| 37 | 82350 |
| 38 | 99238 |
| 39 | 99666 |
| 40 | 112110 |
| 41 | 115650 |