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 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 4 |
| 7 | 8 |
| 8 | 16 |
| 9 | 32 |
| 10 | 70 |
| 11 | 170 |
| 12 | 452 |
| 13 | 1277 |
| 14 | 3731 |
| 15 | 11145 |
| 16 | 34031 |
| 17 | 106888 |
| 18 | 348016 |
| 19 | 1180538 |
| 20 | 4173726 |
| 21 | 15320402 |
| 22 | 58053312 |
| 23 | 225891952 |
| 24 | 899492200 |
| 25 | 3660479037 |
| 26 | 15228099789 |
| 27 | 64831944993 |
| 28 | 282763031581 |
| 29 | 1263953233142 |
| 30 | 5788015999020 |
| 31 | 27121892020940 |
| 32 | 129849269955372 |
| 33 | 634208223729772 |