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 | 14 |
| 2 | 117 |
| 3 | 813 |
| 4 | 4871 |
| 5 | 27743 |
| 6 | 151208 |
| 7 | 804065 |
| 8 | 4185683 |
| 9 | 21472005 |
| 10 | 108766010 |
| 11 | 545507633 |
| 12 | 2712801330 |
| 13 | 13394412999 |
| 14 | 65722444172 |
| 15 | 320721839860 |
| 16 | 1557502222385 |
| 17 | 7530671086667 |
| 18 | 36267851679585 |
| 19 | 174038009185816 |
| 20 | 832392015517829 |
| 21 | 3969017685816667 |
| 22 | 18871416851149078 |