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 | 15625 |
| 1 | 18750 |
| 2 | 34375 |
| 3 | 37500 |
| 4 | 87500 |
| 5 | 187500 |
| 6 | 475000 |
| 7 | 1212500 |
| 8 | 2437500 |
| 9 | 6362500 |
| 10 | 12737500 |
| 11 | 25487500 |
| 12 | 50987500 |
| 13 | 101987500 |
| 14 | 206975000 |
| 15 | 530037500 |
| 16 | 1060087500 |
| 17 | 3890025000 |
| 18 | 15175012500 |
| 19 | 45525375000 |
| 20 | 177026512500 |
| 21 | 596222100000 |
| 22 | 2708984250000 |
| 23 | 12765250350000 |