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 | 9 |
| 2 | 6 |
| 3 | 243 |
| 4 | 1 |
| 5 | 243 |
| 6 | 6561 |
| 7 | 0 |
| 8 | 90 |
| 9 | 8748 |
| 10 | 177147 |
| 11 | 0 |
| 12 | 15 |
| 13 | 4860 |
| 14 | 295245 |
| 15 | 4782969 |
| 16 | 0 |
| 17 | 1 |
| 18 | 1458 |
| 19 | 216513 |
| 20 | 9565938 |
| 21 | 129140163 |
| 22 | 0 |
| 23 | 0 |
| 24 | 252 |
| 25 | 91854 |
| 26 | 8680203 |
| 27 | 301327047 |
| 28 | 3486784401 |
| 29 | 0 |
| 30 | 0 |
| 31 | 24 |
| 32 | 24786 |
| 33 | 4723920 |
| 34 | 325241892 |
| 35 | 9298091736 |
| 36 | 94143178827 |
| 37 | 0 |
| 38 | 0 |
| 39 | 1 |
| 40 | 4374 |
| 41 | 1712421 |
| 42 | 215233605 |
| 43 | 11622614670 |
| 44 | 282429536481 |
| 45 | 2541865828329 |