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 | 259 |
| 2 | 66802 |
| 3 | 17265409 |
| 4 | 4462406596 |
| 5 | 1153350806022 |
| 6 | 298094324981779 |
| 7 | 77045272021641917 |
| 8 | 19913072619720776033 |
| 9 | 5146720243221262934094 |
| 10 | 1330218081751512472685764 |
| 11 | 343807329988307215923432747 |
| 12 | 88860226586342124489251555257 |
| 13 | 22966758356328845813340839281382 |