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 | 2 |
| 2 | 36 |
| 3 | 412 |
| 4 | 4371 |
| 5 | 45118 |
| 6 | 460161 |
| 7 | 4663480 |
| 8 | 47087659 |
| 9 | 474329018 |
| 10 | 4770493824 |
| 11 | 47924729801 |
| 12 | 481060418376 |
| 13 | 4825817782189 |
| 14 | 48387664042144 |
| 15 | 484992123875142 |
| 16 | 4859631205206357 |
| 17 | 48681601698828085 |
| 18 | 487571138851821274 |
| 19 | 4882443976989269954 |
| 20 | 48884842829781286250 |
| 21 | 489393391263430721900 |