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 | 5 |
| 2 | 30 |
| 3 | 175 |
| 4 | 1025 |
| 5 | 6000 |
| 6 | 35125 |
| 7 | 205625 |
| 8 | 1203750 |
| 9 | 7046875 |
| 10 | 41253125 |
| 11 | 241500000 |
| 12 | 1413765625 |
| 13 | 8276328125 |
| 14 | 48450468750 |
| 15 | 283633984375 |
| 16 | 1660422265625 |
| 17 | 9720281250000 |
| 18 | 56903517578125 |
| 19 | 333118994140625 |
| 20 | 1950112558593750 |
| 21 | 11416157763671875 |
| 22 | 66831351611328125 |
| 23 | 391237546875000000 |