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) |
|---|---|
| 2 | 4 |
| 3 | 45 |
| 4 | 176 |
| 5 | 750 |
| 6 | 1101 |
| 7 | 4459 |
| 8 | 6080 |
| 9 | 13284 |
| 10 | 16350 |
| 11 | 46585 |
| 12 | 33954 |
| 13 | 109850 |
| 14 | 92463 |
| 15 | 142705 |
| 16 | 198400 |
| 17 | 432344 |
| 18 | 255096 |
| 19 | 761349 |
| 20 | 500355 |
| 21 | 824866 |
| 22 | 925529 |
| 23 | 2007555 |
| 24 | 1044616 |
| 25 | 2612500 |
| 26 | 2158130 |
| 27 | 3301641 |
| 28 | 2848741 |