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 | 2 |
| 1 | 46 |
| 2 | 7970 |
| 3 | 3487246 |
| 4 | 2849229890 |
| 5 | 3741386059246 |
| 6 | 7205584123783010 |
| 7 | 19133892392367261646 |
| 8 | 67000387673723462963330 |
| 9 | 299131045427247559446422446 |
| 10 | 1658470810032820740402966226850 |
| 11 | 11179247066648898992009055586869646 |
| 12 | 90035623994788132387893239340761189570 |