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 | 1 |
| 1 | 20 |
| 2 | 400 |
| 3 | 13000 |
| 4 | 310000 |
| 5 | 11200000 |
| 6 | 224000000 |
| 7 | 10030000000 |
| 8 | 201100000000 |
| 9 | 4022000000000 |
| 10 | 130440000000000 |
| 11 | 3114300000000000 |
| 12 | 112341000000000000 |
| 13 | 2302320000000000000 |
| 14 | 101101400000000000000 |
| 15 | 2022033000000000000000 |