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 | 0 |
| 2 | 1025 |
| 3 | 476073 |
| 4 | 27022500 |
| 5 | 551536100 |
| 6 | 6129324225 |
| 7 | 45502479225 |
| 8 | 253405810448 |
| 9 | 1137920432400 |
| 10 | 4322847530025 |
| 11 | 14366776735025 |
| 12 | 42801847892100 |
| 13 | 116415023802948 |
| 14 | 293153032943225 |
| 15 | 691043521403025 |
| 16 | 1538402208782400 |