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 | 6 |
| 5 | 14 |
| 6 | 44 |
| 7 | 110 |
| 8 | 152 |
| 9 | 884 |
| 10 | 2144 |
| 11 | 8384 |
| 12 | 18632 |
| 13 | 116624 |
| 14 | 8394752 |
| 15 | 15370304 |
| 16 | 73995392 |
| 17 | 536920064 |
| 18 | 2147581952 |
| 19 | 34360131584 |
| 20 | 27034175140420610 |
| 21 | 36028797421617152 |
| 22 | 576460753914036224 |