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 | 72 |
| 4 | 164 |
| 5 | 336 |
| 6 | 702 |
| 7 | 1488 |
| 8 | 3164 |
| 9 | 6612 |
| 10 | 13916 |
| 11 | 29532 |
| 12 | 62032 |
| 13 | 130548 |
| 14 | 275904 |
| 15 | 581196 |
| 16 | 1223824 |
| 17 | 2581620 |
| 18 | 5442424 |
| 19 | 11466060 |
| 20 | 24172016 |
| 21 | 50959908 |
| 22 | 107395128 |
| 23 | 226366524 |
| 24 | 477188096 |
| 25 | 1005780564 |
| 26 | 2119935656 |
| 27 | 4468615788 |
| 28 | 9419000656 |