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 | 53 |
| 2 | 103 |
| 3 | 139 |
| 4 | 983 |
| 5 | 1777 |
| 6 | 21827623 |
| 7 | 2131900273 |
| 8 | 104463111073 |
| 9 | 23481740411754673 |
| 10 | 606997343490162673 |
| 11 | 1714167050058087673 |
| 12 | 11510631741140058401923 |
| 13 | 10465247677041459437875114423 |