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) |
|---|---|
| 3 | 1 |
| 4 | 14 |
| 5 | 131 |
| 6 | 1028 |
| 7 | 7333 |
| 8 | 49362 |
| 9 | 319943 |
| 10 | 2020552 |
| 11 | 12526153 |
| 12 | 76603094 |
| 13 | 463676491 |
| 14 | 2784550604 |
| 15 | 16619355501 |
| 16 | 98706690714 |
| 17 | 583943891087 |
| 18 | 3443573355152 |
| 19 | 20254044891793 |
| 20 | 118871039217822 |
| 21 | 696401860980499 |
| 22 | 4073713439171732 |
| 23 | 23799679604123189 |
| 24 | 138895001298962786 |
| 25 | 809854583626750039 |