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 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 0 |
| 8 | 4 |
| 9 | 3 |
| 10 | 9 |
| 11 | 0 |
| 12 | 27 |
| 13 | 43 |
| 14 | 71 |
| 15 | 0 |
| 16 | 190 |
| 17 | 318 |
| 18 | 604 |
| 19 | 0 |
| 20 | 1846 |
| 21 | 3127 |
| 22 | 5664 |
| 23 | 0 |
| 24 | 19048 |
| 25 | 34065 |
| 26 | 62045 |
| 27 | 0 |
| 28 | 205713 |
| 29 | 378243 |
| 30 | 705836 |
| 31 | 0 |
| 32 | 2403370 |
| 33 | 4434940 |
| 34 | 8276125 |
| 35 | 0 |
| 36 | 28980680 |
| 37 | 54167797 |
| 38 | 101541048 |
| 39 | 0 |
| 40 | 358095372 |
| 41 | 674776903 |
| 42 | 1274888645 |
| 43 | 0 |
| 44 | 4551828850 |
| 45 | 8612421500 |