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 | 2 |
| 2 | 31 |
| 3 | 199 |
| 4 | 659 |
| 5 | 1601 |
| 6 | 5693 |
| 7 | 38917 |
| 8 | 51797 |
| 9 | 84463 |
| 10 | 697373 |
| 11 | 8059169 |
| 12 | 8510617 |
| 13 | 9465251 |
| 14 | 28268543 |
| 15 | 36254039 |
| 16 | 40121999 |
| 17 | 48667219 |
| 18 | 54973229 |
| 19 | 63627491 |
| 20 | 90443813 |
| 21 | 97626083 |
| 22 | 102534899 |
| 23 | 110364689 |
| 24 | 139100699 |
| 25 | 161967391 |
| 26 | 183528421 |
| 27 | 219566989 |