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 | 256 |
| 3 | 13122 |
| 4 | 131072 |
| 5 | 1562500 |
| 6 | 3359232 |
| 7 | 34588806 |
| 8 | 67108864 |
| 9 | 258280326 |
| 10 | 400000000 |
| 11 | 2143588810 |
| 12 | 1719926784 |
| 13 | 9788768652 |
| 14 | 8854734336 |
| 15 | 20503125000 |
| 16 | 34359738368 |
| 17 | 111612119056 |
| 18 | 66119763456 |
| 19 | 305704134738 |
| 20 | 204800000000 |
| 21 | 453874312332 |
| 22 | 548758735360 |
| 23 | 1722841676182 |
| 24 | 880602513408 |
| 25 | 3051757812500 |