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 | 13 |
| 2 | 309 |
| 3 | 2233 |
| 4 | 27609 |
| 5 | 371691 |
| 6 | 4406933 |
| 7 | 56562977 |
| 8 | 728459961 |
| 9 | 9260503697 |
| 10 | 118800214951 |
| 11 | 1524147275433 |
| 12 | 19534446701521 |
| 13 | 250583781238959 |
| 14 | 3214379129443263 |
| 15 | 41229745589418633 |
| 16 | 528882044555348133 |