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 | 6 |
| 2 | 66 |
| 3 | 3204 |
| 4 | 6810 |
| 5 | 37716 |
| 6 | 72006 |
| 7 | 182430 |
| 8 | 532236 |
| 9 | 370614 |
| 10 | 2155134 |
| 11 | 3203694 |
| 12 | 6353634 |
| 13 | 51712890 |
| 14 | 42020844 |
| 15 | 28698786 |
| 16 | 33163770 |
| 17 | 55637466 |
| 18 | 125033580 |
| 19 | 172985436 |
| 20 | 105470250 |
| 21 | 151375626 |
| 22 | 178631034 |
| 23 | 185921166 |
| 24 | 217064574 |
| 25 | 939603126 |
| 26 | 376267326 |
| 27 | 1812742734 |
| 28 | 2193232470 |
| 29 | 853918566 |