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 | 192 |
| 2 | 708 |
| 3 | 3036 |
| 4 | 13932 |
| 5 | 66532 |
| 6 | 327192 |
| 7 | 1649420 |
| 8 | 8500668 |
| 9 | 44693472 |
| 10 | 239238888 |
| 11 | 1301236304 |
| 12 | 7177627944 |
| 13 | 40078823652 |
| 14 | 226167613792 |
| 15 | 1287874058656 |
| 16 | 7390391650172 |
| 17 | 42688584938548 |
| 18 | 247956702607932 |
| 19 | 1447080255512308 |
| 20 | 8479116559291112 |
| 21 | 49852445684576540 |