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 | 1 |
| 2 | 47 |
| 3 | 329 |
| 4 | 1750 |
| 5 | 10157 |
| 6 | 57249 |
| 7 | 326938 |
| 8 | 1871991 |
| 9 | 10717083 |
| 10 | 61406130 |
| 11 | 351621409 |
| 12 | 2013957691 |
| 13 | 11534261710 |
| 14 | 66064401075 |
| 15 | 378390334671 |
| 16 | 2167284760374 |
| 17 | 12413363760441 |
| 18 | 71098932771545 |
| 19 | 407227101232548 |
| 20 | 2332439882554127 |