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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 248 |
| 5 | 17608 |
| 6 | 90148 |
| 7 | 106978 |
| 8 | 253828 |
| 9 | 364808 |
| 10 | 1642798 |
| 11 | 1926088 |
| 12 | 6176264 |
| 13 | 21879938 |
| 14 | 30484408 |
| 15 | 34634428 |
| 16 | 96593698 |
| 17 | 134396408 |
| 18 | 223622468 |
| 19 | 283585928 |
| 20 | 327327388 |
| 21 | 457961188 |
| 22 | 809965148 |
| 23 | 1709420344 |
| 24 | 1815124028 |
| 25 | 2164392968 |
| 26 | 2360006456 |
| 27 | 2431619908 |
| 28 | 2500777828 |
| 29 | 2922255548 |
| 30 | 3888155428 |
| 31 | 5672481928 |