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 | 28 |
| 2 | 462 |
| 3 | 5712 |
| 4 | 58289 |
| 5 | 516292 |
| 6 | 4093670 |
| 7 | 29660488 |
| 8 | 199276056 |
| 9 | 1255092972 |
| 10 | 7472840004 |
| 11 | 42341686632 |
| 12 | 229538522801 |
| 13 | 1195827758664 |
| 14 | 6009154128786 |
| 15 | 29217982425632 |
| 16 | 137830326653131 |
| 17 | 632273980209340 |