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) |
|---|---|
| 3 | 0 |
| 4 | 253 |
| 5 | 4382 |
| 6 | 885775 |
| 7 | 150051213 |
| 8 | 570623341475 |
| 9 | 855935016215 |
| 10 | 1426559238830 |
| 11 | 1997331745490 |
| 12 | 3138428376974 |
| 13 | 3138428381103 |
| 14 | 3138429262496 |
| 15 | 3138578427934 |