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 | 31 |
| 2 | 341 |
| 3 | 6483 |
| 4 | 69905 |
| 5 | 2027247 |
| 6 | 21041413 |
| 7 | 417263459 |
| 8 | 4311810305 |
| 9 | 133666119455 |
| 10 | 1461703693397 |
| 11 | 27806864656979 |
| 12 | 299071474565137 |
| 13 | 8708265758097903 |
| 14 | 90161415181374469 |
| 15 | 1785159701350222947 |
| 16 | 18447025552981295105 |