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 | 3 |
| 1 | 12 |
| 2 | 93 |
| 3 | 6654 |
| 4 | 43053375 |
| 5 | 1853020231905216 |
| 6 | 3433683820292514337678080994497 |
| 7 | 11790184577738583171520872861415952349498504106613519190091458 |