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 | 0 |
| 2 | 1172 |
| 3 | 28680 |
| 4 | 349273 |
| 5 | 11394429 |
| 6 | 306224454 |
| 7 | 7600681910 |
| 8 | 204093228252 |
| 9 | 5314350209386 |
| 10 | 138643667659572 |
| 11 | 3640560048826152 |
| 12 | 95207607193735652 |
| 13 | 2491557031345822081 |
| 14 | 65239890207048823769 |
| 15 | 1707524253811111768156 |