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 | 1 |
| 2 | 3 |
| 3 | 10 |
| 4 | 32 |
| 5 | 96 |
| 6 | 272 |
| 7 | 736 |
| 8 | 1920 |
| 9 | 4864 |
| 10 | 12032 |
| 11 | 29184 |
| 12 | 69632 |
| 13 | 163840 |
| 14 | 380928 |
| 15 | 876544 |
| 16 | 1998848 |
| 17 | 4521984 |
| 18 | 10158080 |
| 19 | 22675456 |
| 20 | 50331648 |
| 21 | 111149056 |
| 22 | 244318208 |
| 23 | 534773760 |
| 24 | 1166016512 |
| 25 | 2533359616 |
| 26 | 5486149632 |
| 27 | 11844714496 |
| 28 | 25501368320 |
| 29 | 54760833024 |
| 30 | 117306294272 |
| 31 | 250718715904 |