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 | 17 |
| 1 | 19 |
| 2 | 25 |
| 3 | 43 |
| 4 | 97 |
| 5 | 259 |
| 6 | 745 |
| 7 | 2203 |
| 8 | 6577 |
| 9 | 19699 |
| 10 | 59065 |
| 11 | 177163 |
| 12 | 531457 |
| 13 | 1594339 |
| 14 | 4782985 |
| 15 | 14348923 |
| 16 | 43046737 |
| 17 | 129140179 |
| 18 | 387420505 |
| 19 | 1162261483 |
| 20 | 3486784417 |
| 21 | 10460353219 |
| 22 | 31381059625 |
| 23 | 94143178843 |
| 24 | 282429536497 |
| 25 | 847288609459 |
| 26 | 2541865828345 |
| 27 | 7625597485003 |