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 | 3 |
| 2 | 11 |
| 3 | 39 |
| 4 | 43 |
| 5 | 151 |
| 6 | 171 |
| 7 | 2255 |
| 8 | 2359 |
| 9 | 683 |
| 10 | 9399 |
| 11 | 2731 |
| 12 | 140911 |
| 13 | 1649373 |
| 14 | 599479 |
| 15 | 43691 |
| 16 | 8727391 |
| 17 | 8965359 |
| 18 | 174763 |
| 19 | 9588151 |
| 20 | 139090655 |
| 21 | 1649061309 |
| 22 | 572942063 |
| 23 | 2221095391 |
| 24 | 2796203 |
| 25 | 613576119 |
| 26 | 11184811 |
| 27 | 2454285751 |
| 28 | 36654862063 |
| 29 | 44739243 |