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) |
|---|---|
| 3 | 561 |
| 4 | 1105 |
| 5 | 10585 |
| 6 | 101101 |
| 7 | 1024651 |
| 8 | 10024561 |
| 9 | 100427041 |
| 10 | 1001152801 |
| 11 | 10017089857 |
| 12 | 100023777217 |
| 13 | 1000151515441 |
| 14 | 10000879761601 |
| 15 | 100000782192961 |
| 16 | 1000040508690301 |
| 17 | 10000092861302401 |
| 18 | 100001371359120001 |
| 19 | 1000004296444433281 |
| 20 | 10000011591390633121 |