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) |
|---|---|
| 0 | 1 |
| 1 | 13 |
| 2 | 485 |
| 3 | 4197 |
| 4 | 23793 |
| 5 | 84769 |
| 6 | 252673 |
| 7 | 622573 |
| 8 | 1395261 |
| 9 | 2787125 |
| 10 | 5260181 |
| 11 | 9249417 |
| 12 | 15637897 |
| 13 | 25112577 |
| 14 | 39258381 |
| 15 | 59174749 |
| 16 | 87380293 |
| 17 | 125264525 |
| 18 | 176663297 |
| 19 | 244000537 |
| 20 | 332379769 |
| 21 | 444344469 |
| 22 | 587923621 |
| 23 | 766764301 |
| 24 | 990981473 |