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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 6 |
| 5 | 12 |
| 6 | 34 |
| 7 | 68 |
| 8 | 160 |
| 9 | 320 |
| 10 | 736 |
| 11 | 1472 |
| 12 | 3136 |
| 13 | 6272 |
| 14 | 13504 |
| 15 | 27008 |
| 16 | 56176 |
| 17 | 112352 |
| 18 | 234064 |
| 19 | 468128 |
| 20 | 954976 |
| 21 | 1909952 |
| 22 | 3913504 |
| 23 | 7827008 |
| 24 | 15878656 |
| 25 | 31757312 |
| 26 | 64413184 |
| 27 | 128826368 |
| 28 | 259449856 |
| 29 | 518899712 |
| 30 | 1046785024 |
| 31 | 2093570048 |
| 32 | 4207876096 |
| 33 | 8415752192 |