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 | 6 |
| 1 | 62 |
| 2 | 566 |
| 3 | 5102 |
| 4 | 45926 |
| 5 | 413342 |
| 6 | 3720086 |
| 7 | 33480782 |
| 8 | 301327046 |
| 9 | 2711943422 |
| 10 | 24407490806 |
| 11 | 219667417262 |
| 12 | 1977006755366 |
| 13 | 17793060798302 |
| 14 | 160137547184726 |
| 15 | 1441237924662542 |
| 16 | 12971141321962886 |
| 17 | 116740271897665982 |
| 18 | 1050662447078993846 |
| 19 | 9455962023710944622 |
| 20 | 85103658213398501606 |