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 | 4 |
| 3 | 16 |
| 4 | 64 |
| 5 | 225 |
| 6 | 900 |
| 7 | 3364 |
| 8 | 12769 |
| 9 | 48400 |
| 10 | 184041 |
| 11 | 703921 |
| 12 | 2702736 |
| 13 | 10394176 |
| 14 | 40106889 |
| 15 | 155102116 |
| 16 | 601034256 |
| 17 | 2333566249 |
| 18 | 9075039169 |
| 19 | 35345128009 |
| 20 | 137845868176 |
| 21 | 538256995600 |
| 22 | 2104098203601 |
| 23 | 8233427666025 |
| 24 | 32247599617809 |