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 | 4 |
| 2 | 24 |
| 3 | 236 |
| 4 | 3248 |
| 5 | 57556 |
| 6 | 416152 |
| 7 | 2136452 |
| 8 | 63349408 |
| 9 | 710302388 |
| 10 | 26725332056 |
| 11 | 1112171931196 |
| 12 | 375714836272 |
| 13 | 2662087948804 |
| 14 | 142662781936712 |
| 15 | 2738366988282628 |
| 16 | 168623511779891008 |
| 17 | 170109214167178588 |