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 | 7 |
| 2 | 63 |
| 3 | 785 |
| 4 | 11819 |
| 5 | 183010 |
| 6 | 2625117 |
| 7 | 33345183 |
| 8 | 371484319 |
| 9 | 3651371519 |
| 10 | 32017940222 |
| 11 | 253426591764 |
| 12 | 1830279313811 |
| 13 | 12175210709509 |
| 14 | 75202293506213 |
| 15 | 434279600673295 |
| 16 | 2358572224659659 |
| 17 | 12108001563352798 |
| 18 | 59013152727127932 |