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 | 7 |
| 2 | 7 |
| 3 | 113 |
| 4 | 113 |
| 5 | 99532 |
| 6 | 364913 |
| 7 | 1725033 |
| 8 | 78256779 |
| 9 | 811528438 |
| 10 | 6701487259 |
| 11 | 6701487259 |
| 12 | 567663097408 |
| 13 | 2851718461558 |
| 14 | 44485467702853 |
| 15 | 136308121570117 |
| 16 | 9627687726852338 |
| 17 | 21208174623389167 |
| 18 | 842468587426513207 |