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 | 1 |
| 1 | 5 |
| 2 | 33 |
| 3 | 287 |
| 4 | 3309 |
| 5 | 50975 |
| 6 | 1058493 |
| 7 | 29885567 |
| 8 | 1156711869 |
| 9 | 61815727295 |
| 10 | 4589058616413 |
| 11 | 475576073939807 |
| 12 | 69061902766811229 |
| 13 | 14093318360697120095 |
| 14 | 4049931601653596366013 |
| 15 | 1641314561238334948886207 |
| 16 | 939097032426474389539281789 |