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 | 6 |
| 1 | 36 |
| 2 | 286 |
| 3 | 2556 |
| 4 | 24310 |
| 5 | 240276 |
| 6 | 2437006 |
| 7 | 25173996 |
| 8 | 263567590 |
| 9 | 2787694596 |
| 10 | 29716508926 |
| 11 | 318719062236 |
| 12 | 3434943872470 |
| 13 | 37162689280116 |
| 14 | 403310957409646 |
| 15 | 4387917394947276 |
| 16 | 47836135613930950 |
| 17 | 522357603781540836 |