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 | 49 |
| 2 | 1849 |
| 3 | 144400 |
| 4 | 148225 |
| 5 | 522729 |
| 6 | 16564900 |
| 7 | 40322500 |
| 8 | 46717225 |
| 9 | 98446084 |
| 10 | 98863249 |
| 11 | 1429293636 |
| 12 | 1697440000 |
| 13 | 4013222500 |
| 14 | 4228250625 |
| 15 | 4247128900 |
| 16 | 4684991809 |
| 17 | 5205622500 |
| 18 | 5227290000 |
| 19 | 6161465025 |
| 20 | 6557274529 |
| 21 | 104409765625 |
| 22 | 121975562500 |
| 23 | 123151864900 |
| 24 | 127413302500 |
| 25 | 140301186624 |