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 | 25 |
| 2 | 2205 |
| 3 | 194485 |
| 4 | 17153945 |
| 5 | 1513010465 |
| 6 | 133450391205 |
| 7 | 11770577485085 |
| 8 | 1038187247574145 |
| 9 | 91570083319317865 |
| 10 | 8076654937439905005 |
| 11 | 712376276332499775685 |
| 12 | 62832938018547611186345 |
| 13 | 5541984245134992804289265 |