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 | 2 |
| 1 | 20 |
| 2 | 22 |
| 3 | 42 |
| 4 | 64 |
| 5 | 106 |
| 6 | 170 |
| 7 | 276 |
| 8 | 446 |
| 9 | 722 |
| 10 | 1168 |
| 11 | 1890 |
| 12 | 3058 |
| 13 | 4948 |
| 14 | 8006 |
| 15 | 12954 |
| 16 | 20960 |
| 17 | 33914 |
| 18 | 54874 |
| 19 | 88788 |
| 20 | 143662 |
| 21 | 232450 |
| 22 | 376112 |
| 23 | 608562 |
| 24 | 984674 |
| 25 | 1593236 |
| 26 | 2577910 |
| 27 | 4171146 |
| 28 | 6749056 |
| 29 | 10920202 |