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 | 48 |
| 3 | 180 |
| 4 | 448 |
| 5 | 900 |
| 6 | 1584 |
| 7 | 2548 |
| 8 | 3840 |
| 9 | 5508 |
| 10 | 7600 |
| 11 | 10164 |
| 12 | 13248 |
| 13 | 16900 |
| 14 | 21168 |
| 15 | 26100 |
| 16 | 31744 |
| 17 | 38148 |
| 18 | 45360 |
| 19 | 53428 |
| 20 | 62400 |
| 21 | 72324 |
| 22 | 83248 |
| 23 | 95220 |
| 24 | 108288 |
| 25 | 122500 |
| 26 | 137904 |
| 27 | 154548 |
| 28 | 172480 |
| 29 | 191748 |
| 30 | 212400 |