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 | 131 |
| 2 | 90040 |
| 3 | 49793133 |
| 4 | 28579431833 |
| 5 | 16294017491392 |
| 6 | 9303034425177393 |
| 7 | 5309783310438438755 |
| 8 | 3030852157018381983096 |
| 9 | 1729989715204411185894125 |
| 10 | 987471788038820650012763705 |
| 11 | 563644449821238971691233574464 |
| 12 | 321725839534452657823357410831785 |