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 | 1 |
| 2 | 5 |
| 3 | 109 |
| 4 | 289 |
| 5 | 1009 |
| 6 | 1189 |
| 7 | 6485 |
| 8 | 141481 |
| 9 | 375121 |
| 10 | 1309681 |
| 11 | 1543321 |
| 12 | 8417525 |
| 13 | 183642229 |
| 14 | 486906769 |
| 15 | 1699964929 |
| 16 | 2003229469 |
| 17 | 10925940965 |
| 18 | 238367471761 |
| 19 | 632004611041 |
| 20 | 2206553168161 |
| 21 | 2600190307441 |
| 22 | 14181862955045 |
| 23 | 309400794703549 |