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 | 31 |
| 2 | 260 |
| 3 | 283 |
| 4 | 3129 |
| 5 | 3152 |
| 6 | 3381 |
| 7 | 46660 |
| 8 | 46683 |
| 9 | 46912 |
| 10 | 49781 |
| 11 | 823547 |
| 12 | 823570 |
| 13 | 823799 |
| 14 | 826668 |
| 15 | 870199 |
| 16 | 16777220 |
| 17 | 16777243 |
| 18 | 16777472 |
| 19 | 16780341 |
| 20 | 16823872 |
| 21 | 17600759 |
| 22 | 387420493 |
| 23 | 387420516 |
| 24 | 387420745 |
| 25 | 387423614 |
| 26 | 387467145 |
| 27 | 388244032 |
| 28 | 404197705 |
| 29 | 10000000004 |