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 | 25 |
| 2 | 625 |
| 3 | 15625 |
| 4 | 390625 |
| 5 | 9765625 |
| 6 | 244140625 |
| 7 | 6103515625 |
| 8 | 152587890625 |
| 9 | 3814697265625 |
| 10 | 95367431640625 |
| 11 | 2384185791015625 |
| 12 | 59604644775390625 |
| 13 | 1490116119384765625 |
| 14 | 37252902984619140625 |
| 15 | 931322574615478515625 |
| 16 | 23283064365386962890625 |
| 17 | 582076609134674072265625 |
| 18 | 14551915228366851806640625 |
| 19 | 363797880709171295166015625 |
| 20 | 9094947017729282379150390625 |