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 | 81 |
| 3 | 100 |
| 4 | 2025 |
| 5 | 3025 |
| 6 | 9801 |
| 7 | 10000 |
| 8 | 88209 |
| 9 | 494209 |
| 10 | 998001 |
| 11 | 1000000 |
| 12 | 4941729 |
| 13 | 7441984 |
| 14 | 23804641 |
| 15 | 24502500 |
| 16 | 25502500 |
| 17 | 28005264 |
| 18 | 52881984 |
| 19 | 60481729 |
| 20 | 99980001 |
| 21 | 100000000 |
| 22 | 300814336 |
| 23 | 493817284 |
| 24 | 1518037444 |
| 25 | 6049417284 |
| 26 | 6832014336 |
| 27 | 9048004641 |
| 28 | 9999800001 |
| 29 | 10000000000 |