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 | 13 |
| 2 | 19 |
| 3 | 43 |
| 4 | 139 |
| 5 | 523 |
| 6 | 32779 |
| 7 | 8388619 |
| 8 | 536870923 |
| 9 | 2147483659 |
| 10 | 36028797018963979 |
| 11 | 2361183241434822606859 |
| 12 | 151115727451828646838283 |
| 13 | 254629497041810760783555711051172270131433549208242031329517556169297662470417088272924683 |