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 | 4 |
| 2 | 16 |
| 3 | 36 |
| 4 | 81 |
| 5 | 169 |
| 6 | 361 |
| 7 | 784 |
| 8 | 1681 |
| 9 | 3600 |
| 10 | 7744 |
| 11 | 16641 |
| 12 | 35721 |
| 13 | 76729 |
| 14 | 164836 |
| 15 | 354025 |
| 16 | 760384 |
| 17 | 1633284 |
| 18 | 3508129 |
| 19 | 7535025 |
| 20 | 16184529 |
| 21 | 34762816 |
| 22 | 74666881 |
| 23 | 160376896 |
| 24 | 344473600 |
| 25 | 739894401 |
| 26 | 1589218225 |
| 27 | 3413480625 |
| 28 | 7331811876 |
| 29 | 15747991081 |