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 | 12 |
| 4 | 114 |
| 5 | 1968 |
| 6 | 66312 |
| 7 | 4381020 |
| 8 | 578266212 |
| 9 | 153350225268 |
| 10 | 82409298702462 |
| 11 | 90180040305841212 |
| 12 | 201800030110625440248 |
| 13 | 926548406689594565864346 |
| 14 | 8752381854153235620928637604 |