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) |
|---|---|
| 4 | 4 |
| 5 | 30 |
| 6 | 126 |
| 7 | 393 |
| 8 | 1016 |
| 9 | 2304 |
| 10 | 4740 |
| 11 | 9042 |
| 12 | 16236 |
| 13 | 27742 |
| 14 | 45474 |
| 15 | 71955 |
| 16 | 110448 |
| 17 | 165104 |
| 18 | 241128 |
| 19 | 344964 |
| 20 | 484500 |
| 21 | 669294 |
| 22 | 910822 |
| 23 | 1222749 |
| 24 | 1621224 |
| 25 | 2125200 |
| 26 | 2756780 |
| 27 | 3541590 |
| 28 | 4509180 |
| 29 | 5693454 |
| 30 | 7133130 |
| 31 | 8872231 |
| 32 | 10960608 |
| 33 | 13454496 |