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 | 3 |
| 2 | 7 |
| 3 | 19 |
| 4 | 139 |
| 5 | 859 |
| 6 | 8179 |
| 7 | 173059 |
| 8 | 1026199 |
| 9 | 1827139 |
| 10 | 15828679 |
| 11 | 13187242759 |
| 12 | 18732483199 |
| 13 | 912492556939 |
| 14 | 9130567625119 |