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 | 1 |
| 2 | 5 |
| 3 | 25 |
| 4 | 65 |
| 5 | 625 |
| 6 | 325 |
| 7 | 15625 |
| 8 | 1105 |
| 9 | 4225 |
| 10 | 8125 |
| 11 | 9765625 |
| 12 | 5525 |
| 13 | 244140625 |
| 14 | 203125 |
| 15 | 105625 |
| 16 | 27625 |
| 17 | 152587890625 |
| 18 | 71825 |
| 19 | 3814697265625 |
| 20 | 138125 |
| 21 | 2640625 |
| 22 | 126953125 |
| 23 | 2384185791015625 |
| 24 | 160225 |
| 25 | 17850625 |
| 26 | 3173828125 |
| 27 | 1221025 |
| 28 | 3453125 |