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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 16 |
| 4 | 125 |
| 5 | 1176 |
| 6 | 12847 |
| 7 | 160504 |
| 8 | 2261289 |
| 9 | 35464816 |
| 10 | 612419291 |
| 11 | 11539360944 |
| 12 | 235469524237 |
| 13 | 5170808565976 |
| 14 | 121535533284999 |
| 15 | 3043254281853496 |
| 16 | 80852247370051793 |
| 17 | 2270951670959226336 |
| 18 | 67221368736302224819 |
| 19 | 2091039845329887687136 |