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 | 9 |
| 3 | 25 |
| 4 | 49 |
| 5 | 289 |
| 6 | 841 |
| 7 | 2209 |
| 8 | 2809 |
| 9 | 4489 |
| 10 | 6241 |
| 11 | 6889 |
| 12 | 22201 |
| 13 | 22801 |
| 14 | 24649 |
| 15 | 66049 |
| 16 | 80089 |
| 17 | 208849 |
| 18 | 426409 |
| 19 | 466489 |
| 20 | 822649 |
| 21 | 2042041 |
| 22 | 2468041 |
| 23 | 2866249 |
| 24 | 2886601 |
| 25 | 4068289 |
| 26 | 6046681 |
| 27 | 6086089 |
| 28 | 6466849 |
| 29 | 6806881 |
| 30 | 6848689 |
| 31 | 8082649 |
| 32 | 8288641 |
| 33 | 8462281 |
| 34 | 8826841 |
| 35 | 22648081 |
| 36 | 26020201 |
| 37 | 26822041 |
| 38 | 28440889 |
| 39 | 44262409 |