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 | 7 |
| 4 | 22 |
| 5 | 67 |
| 6 | 213 |
| 7 | 853 |
| 8 | 3413 |
| 9 | 13653 |
| 10 | 66406 |
| 11 | 332031 |
| 12 | 1660156 |
| 13 | 8734003 |
| 14 | 52404019 |
| 15 | 314424115 |
| 16 | 1886544691 |
| 17 | 12193514915 |
| 18 | 85354604406 |
| 19 | 597482230843 |
| 20 | 4182375615902 |
| 21 | 31414617936457 |
| 22 | 251316943491657 |
| 23 | 2010535547933257 |
| 24 | 16084284383466057 |
| 25 | 135502101309790873 |
| 26 | 1219518911788117858 |