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 | 0 |
| 1 | 14025517307 |
| 2 | 448816553824 |
| 3 | 3408200705601 |
| 4 | 14362129722368 |
| 5 | 43829741584375 |
| 6 | 109062422579232 |
| 7 | 235726869378749 |
| 8 | 459588151115776 |
| 9 | 828192771461043 |
| 10 | 1402551730700000 |
| 11 | 2258823587809657 |
| 12 | 3489997522535424 |
| 13 | 5207576397467951 |