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 | 5 |
| 5 | 26 |
| 6 | 182 |
| 7 | 1196 |
| 8 | 8699 |
| 9 | 67054 |
| 10 | 556952 |
| 11 | 4945368 |
| 12 | 46901985 |
| 13 | 473324450 |
| 14 | 5068610666 |
| 15 | 57423496708 |
| 16 | 686431008183 |
| 17 | 8636011443670 |
| 18 | 114084907758220 |
| 19 | 1579087434474288 |
| 20 | 22855092931547133 |
| 21 | 345270138380243850 |
| 22 | 5434925832561946750 |
| 23 | 89001957427837012060 |