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 | 6810 |
| 4 | 72006 |
| 5 | 182430 |
| 6 | 370614 |
| 7 | 3203694 |
| 8 | 6353634 |
| 9 | 28698786 |
| 10 | 33163770 |
| 11 | 55637466 |
| 12 | 105470250 |
| 13 | 151375626 |
| 14 | 178631034 |
| 15 | 185921166 |
| 16 | 217064574 |
| 17 | 376267326 |
| 18 | 853918566 |
| 19 | 1172755854 |
| 20 | 1443472134 |
| 21 | 1472632266 |
| 22 | 2217439890 |
| 23 | 6709586934 |
| 24 | 13826592870 |
| 25 | 17356640970 |
| 26 | 18127936590 |