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 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 19 |
| 5 | 45 |
| 6 | 104 |
| 7 | 236 |
| 8 | 528 |
| 9 | 1168 |
| 10 | 2560 |
| 11 | 5568 |
| 12 | 12032 |
| 13 | 25856 |
| 14 | 55296 |
| 15 | 117760 |
| 16 | 249856 |
| 17 | 528384 |
| 18 | 1114112 |
| 19 | 2342912 |
| 20 | 4915200 |
| 21 | 10289152 |
| 22 | 21495808 |
| 23 | 44826624 |
| 24 | 93323264 |
| 25 | 193986560 |
| 26 | 402653184 |
| 27 | 834666496 |
| 28 | 1728053248 |
| 29 | 3573547008 |
| 30 | 7381975040 |
| 31 | 15233712128 |
| 32 | 31406948352 |