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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 4 |
| 11 | 8 |
| 12 | 13 |
| 13 | 19 |
| 14 | 26 |
| 15 | 46 |
| 16 | 88 |
| 17 | 163 |
| 18 | 284 |
| 19 | 466 |
| 20 | 781 |
| 21 | 1369 |
| 22 | 2468 |
| 23 | 4449 |
| 24 | 7856 |
| 25 | 13724 |
| 26 | 24084 |
| 27 | 42788 |
| 28 | 76759 |
| 29 | 137785 |
| 30 | 246418 |
| 31 | 439757 |
| 32 | 786132 |
| 33 | 1411148 |
| 34 | 2541368 |
| 35 | 4581906 |
| 36 | 8259500 |
| 37 | 14889781 |
| 38 | 26871106 |
| 39 | 48573823 |
| 40 | 87934175 |
| 41 | 159333544 |
| 42 | 288857216 |