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 | 20 |
| 3 | 452 |
| 4 | 2180 |
| 5 | 4052 |
| 6 | 6500 |
| 7 | 27380 |
| 8 | 43220 |
| 9 | 118100 |
| 10 | 130052 |
| 11 | 183620 |
| 12 | 281252 |
| 13 | 357860 |
| 14 | 399620 |
| 15 | 410420 |
| 16 | 455060 |
| 17 | 656660 |
| 18 | 1134020 |
| 19 | 1401140 |
| 20 | 1609220 |
| 21 | 1630820 |
| 22 | 2142452 |
| 23 | 4482020 |
| 24 | 7258052 |
| 25 | 8446052 |
| 26 | 8694452 |
| 27 | 9618500 |
| 28 | 10424180 |
| 29 | 11838980 |
| 30 | 12370340 |
| 31 | 12852452 |
| 32 | 13343780 |