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 | 1 |
| 2 | 1 |
| 3 | 4 |
| 4 | 1 |
| 5 | 12 |
| 6 | 28 |
| 7 | 64 |
| 8 | 1 |
| 9 | 212 |
| 10 | 452 |
| 11 | 960 |
| 12 | 1972 |
| 13 | 4032 |
| 14 | 8128 |
| 15 | 16384 |
| 16 | 1 |
| 17 | 64284 |
| 18 | 129260 |
| 19 | 259904 |
| 20 | 520636 |
| 21 | 1043264 |
| 22 | 2087744 |
| 23 | 4177920 |
| 24 | 8381836 |
| 25 | 16768832 |
| 26 | 33541952 |
| 27 | 67092480 |
| 28 | 134201152 |
| 29 | 268419072 |
| 30 | 536854528 |
| 31 | 1073741824 |
| 32 | 1 |
| 33 | 4294569380 |
| 34 | 8589336404 |
| 35 | 17179068096 |