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 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 2 |
| 8 | 4 |
| 9 | 5 |
| 10 | 10 |
| 11 | 14 |
| 12 | 26 |
| 13 | 42 |
| 14 | 78 |
| 15 | 132 |
| 16 | 249 |
| 17 | 445 |
| 18 | 842 |
| 19 | 1561 |
| 20 | 2988 |
| 21 | 5671 |
| 22 | 10981 |
| 23 | 21209 |
| 24 | 41472 |
| 25 | 81181 |
| 26 | 160176 |
| 27 | 316749 |
| 28 | 629933 |
| 29 | 1256070 |
| 30 | 2515169 |
| 31 | 5049816 |
| 32 | 10172638 |
| 33 | 20543579 |
| 34 | 41602425 |
| 35 | 84440886 |
| 36 | 171794492 |
| 37 | 350238175 |
| 38 | 715497037 |
| 39 | 1464407113 |