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 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 4 |
| 11 | 2 |
| 12 | 7 |
| 13 | 9 |
| 14 | 14 |
| 15 | 26 |
| 16 | 48 |
| 17 | 71 |
| 18 | 154 |
| 19 | 243 |
| 20 | 478 |
| 21 | 894 |
| 22 | 1631 |
| 23 | 3149 |
| 24 | 6062 |
| 25 | 11295 |
| 26 | 22469 |
| 27 | 42900 |
| 28 | 83528 |
| 29 | 164829 |
| 30 | 321012 |
| 31 | 632960 |
| 32 | 1255613 |
| 33 | 2472803 |
| 34 | 4928140 |
| 35 | 9808439 |
| 36 | 19533534 |
| 37 | 39134059 |
| 38 | 78345317 |
| 39 | 157177556 |
| 40 | 316398963 |
| 41 | 636790282 |
| 42 | 1284910954 |