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 | 4095 |
| 1 | 258111 |
| 2 | 1864135 |
| 3 | 6599385 |
| 4 | 11097450 |
| 5 | 50647922 |
| 6 | 84501916 |
| 7 | 404780686 |
| 8 | 1612789139 |
| 9 | 2819363761 |
| 10 | 4984963383 |
| 11 | 25789527134 |
| 12 | 43622974785 |
| 13 | 206178161033 |
| 14 | 352724537908 |
| 15 | 1649404655073 |
| 16 | 2757908607226 |
| 17 | 5016522425438 |