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 | 6 |
| 2 | 75 |
| 3 | 1190 |
| 4 | 21285 |
| 5 | 409266 |
| 6 | 8259888 |
| 7 | 172593900 |
| 8 | 3701885490 |
| 9 | 81033954430 |
| 10 | 1803028662435 |
| 11 | 40658396849388 |
| 12 | 927146157991625 |
| 13 | 21342995124948000 |
| 14 | 495322997953271580 |
| 15 | 11576581508367256920 |
| 16 | 272239271289546497046 |
| 17 | 6437043284012559773100 |