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 | 5 |
| 2 | 50 |
| 3 | 189 |
| 4 | 1015 |
| 5 | 2887 |
| 6 | 12623 |
| 7 | 32303 |
| 8 | 131673 |
| 9 | 319541 |
| 10 | 1277029 |
| 11 | 3001299 |
| 12 | 12025963 |
| 13 | 27634899 |
| 14 | 112196145 |
| 15 | 253256721 |
| 16 | 1046786789 |
| 17 | 2326596207 |
| 18 | 9807566523 |
| 19 | 21492349119 |
| 20 | 92416468657 |
| 21 | 199851940021 |
| 22 | 876060050789 |
| 23 | 1870775860883 |