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 | 36 |
| 3 | 82 |
| 4 | 221 |
| 5 | 493 |
| 6 | 1095 |
| 7 | 2654 |
| 8 | 6203 |
| 9 | 14182 |
| 10 | 33242 |
| 11 | 77781 |
| 12 | 180207 |
| 13 | 419683 |
| 14 | 979186 |
| 15 | 2277663 |
| 16 | 5301348 |
| 17 | 12351370 |
| 18 | 28755901 |
| 19 | 66942929 |
| 20 | 155895195 |
| 21 | 362997882 |
| 22 | 845159395 |
| 23 | 1967953186 |
| 24 | 4582333234 |
| 25 | 10669471213 |
| 26 | 24843252803 |
| 27 | 57846384111 |