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 | 11 |
| 2 | 45 |
| 3 | 18281 |
| 4 | 32769 |
| 5 | 56891 |
| 6 | 180689 |
| 7 | 330539 |
| 8 | 959481 |
| 9 | 1850201 |
| 10 | 3247409 |
| 11 | 4940219 |
| 12 | 2425563239 |
| 13 | 2575561739 |
| 14 | 6003563495 |
| 15 | 7245212645 |
| 16 | 7770160145 |
| 17 | 4983798265289 |
| 18 | 5049762270381 |
| 19 | 5534298528989 |
| 20 | 5603798594169 |
| 21 | 21894082450101 |