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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 9 |
| 3 | 1 |
| 4 | 81 |
| 5 | 81 |
| 6 | 1 |
| 7 | 351 |
| 8 | 1377 |
| 9 | 729 |
| 10 | 1 |
| 11 | 1035 |
| 12 | 11421 |
| 13 | 18225 |
| 14 | 6561 |
| 15 | 1 |
| 16 | 2430 |
| 17 | 62613 |
| 18 | 223803 |
| 19 | 216513 |
| 20 | 59049 |
| 21 | 1 |
| 22 | 4914 |
| 23 | 259119 |
| 24 | 1813023 |
| 25 | 3523257 |
| 26 | 2421009 |
| 27 | 531441 |
| 28 | 1 |
| 29 | 8946 |
| 30 | 874071 |
| 31 | 10978740 |
| 32 | 37850409 |
| 33 | 49069719 |
| 34 | 26040609 |
| 35 | 4782969 |
| 36 | 1 |
| 37 | 15066 |
| 38 | 2525499 |
| 39 | 53362800 |
| 40 | 303255981 |
| 41 | 657274419 |
| 42 | 631883349 |
| 43 | 272629233 |
| 44 | 43046721 |