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 | 22 |
| 3 | 3 |
| 4 | 137 |
| 5 | 7 |
| 6 | 5454 |
| 7 | 31076 |
| 8 | 8744076 |
| 9 | 697642916 |
| 10 | 23169509240 |
| 11 | 29165083170 |
| 12 | 10658896243375 |