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 | 14 |
| 2 | 294 |
| 3 | 343 |
| 4 | 72030 |
| 5 | 16807 |
| 6 | 705894 |
| 7 | 823543 |
| 8 | 172944030 |
| 9 | 40353607 |
| 10 | 18643366434 |
| 11 | 1977326743 |
| 12 | 5398102008390 |
| 13 | 96889010407 |
| 14 | 4069338437094 |
| 15 | 4747561509943 |
| 16 | 16948794590496510 |
| 17 | 232630513987207 |
| 18 | 185639150161791186 |
| 19 | 11398895185373143 |