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 | 23 |
| 5 | 61 |
| 6 | 207 |
| 7 | 631 |
| 8 | 2111 |
| 9 | 6901 |
| 10 | 23183 |
| 11 | 77749 |
| 12 | 263807 |
| 13 | 896403 |
| 14 | 3063147 |
| 15 | 10493077 |
| 16 | 36060927 |
| 17 | 124198397 |
| 18 | 428708475 |
| 19 | 1482448439 |
| 20 | 5134798223 |
| 21 | 17811210781 |
| 22 | 61864011135 |
| 23 | 215127430973 |
| 24 | 748898387039 |
| 25 | 2609615501811 |
| 26 | 9101687173595 |