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 | 1 |
| 1 | 3 |
| 2 | 9 |
| 3 | 28 |
| 4 | 69 |
| 5 | 174 |
| 6 | 413 |
| 7 | 933 |
| 8 | 2046 |
| 9 | 4391 |
| 10 | 9168 |
| 11 | 18675 |
| 12 | 37522 |
| 13 | 73725 |
| 14 | 142893 |
| 15 | 273159 |
| 16 | 514512 |
| 17 | 957666 |
| 18 | 1762837 |
| 19 | 3208884 |
| 20 | 5783727 |
| 21 | 10330732 |
| 22 | 18280590 |
| 23 | 32086827 |
| 24 | 55880614 |
| 25 | 96579240 |
| 26 | 165733335 |
| 27 | 282513246 |
| 28 | 478419366 |
| 29 | 805196022 |
| 30 | 1347288750 |
| 31 | 2241377166 |
| 32 | 3708721887 |