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 | 0 |
| 2 | 55 |
| 3 | 686 |
| 4 | 61105 |
| 5 | 70196 |
| 6 | 7035296 |
| 7 | 10834269 |
| 8 | 61666605 |
| 9 | 96021948 |
| 10 | 703686296 |
| 11 | 1083676269 |
| 12 | 1108342689 |
| 13 | 9603552948 |
| 14 | 61722221605 |
| 15 | 70370196296 |
| 16 | 108370096269 |
| 17 | 110836762689 |
| 18 | 111083426889 |
| 19 | 960368862948 |
| 20 | 7037035296296 |
| 21 | 10837034296269 |