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) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 16 |
| 5 | 29 |
| 6 | 251 |
| 7 | 727 |
| 8 | 7988 |
| 9 | 47049 |
| 10 | 512767 |
| 11 | 3628811 |
| 12 | 58012582 |
| 13 | 479001613 |
| 14 | 8007115559 |
| 15 | 92633212687 |
| 16 | 1648230784216 |
| 17 | 20922789888017 |
| 18 | 449622885136443 |
| 19 | 6402373705728019 |
| 20 | 146721895942876274 |
| 21 | 2507411046373376021 |
| 22 | 60380204535989936347 |
| 23 | 1124000727777607680023 |