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 | 13 |
| 2 | 178 |
| 3 | 1960 |
| 4 | 24347 |
| 5 | 295083 |
| 6 | 3590821 |
| 7 | 43655680 |
| 8 | 530696748 |
| 9 | 6452840307 |
| 10 | 78464174127 |
| 11 | 953998068679 |
| 12 | 11599362088138 |
| 13 | 141035410432226 |
| 14 | 1714816891986887 |
| 15 | 20850061397844599 |
| 16 | 253511401875888073 |