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 | 2 |
| 3 | 6 |
| 4 | 7 |
| 5 | 10 |
| 6 | 24 |
| 7 | 90 |
| 8 | 144 |
| 9 | 766 |
| 10 | 1040 |
| 11 | 1164 |
| 12 | 2122 |
| 13 | 3010 |
| 14 | 8914 |
| 15 | 17838 |
| 16 | 20500 |
| 17 | 87472 |
| 18 | 243252 |
| 19 | 312058 |
| 20 | 1118346 |
| 21 | 1347998 |
| 22 | 2167146 |
| 23 | 3569780 |
| 24 | 6038946 |