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) |
|---|---|
| 0 | 6 |
| 1 | 13 |
| 2 | 162 |
| 3 | 337 |
| 4 | 4206 |
| 5 | 8749 |
| 6 | 109194 |
| 7 | 227137 |
| 8 | 2834838 |
| 9 | 5896813 |
| 10 | 73596594 |
| 11 | 153090001 |
| 12 | 1910676606 |
| 13 | 3974443213 |
| 14 | 49603995162 |
| 15 | 103182433537 |
| 16 | 1287793197606 |
| 17 | 2678768828749 |
| 18 | 33433019142594 |
| 19 | 69544807113937 |