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 | 10 |
| 2 | 193 |
| 3 | 5950 |
| 4 | 270529 |
| 5 | 16873930 |
| 6 | 1384880065 |
| 7 | 144218696590 |
| 8 | 18583827550465 |
| 9 | 2898418007316970 |
| 10 | 538034003700151105 |
| 11 | 117117180185558050750 |
| 12 | 29538673951318735414465 |
| 13 | 8540274169019607609510250 |
| 14 | 2805241403079208727201012545 |
| 15 | 1038436904586470317663800172750 |