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 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 6 |
| 8 | 10 |
| 9 | 20 |
| 10 | 42 |
| 11 | 84 |
| 12 | 170 |
| 13 | 354 |
| 14 | 740 |
| 15 | 1549 |
| 16 | 3269 |
| 17 | 6945 |
| 18 | 14811 |
| 19 | 31711 |
| 20 | 68177 |
| 21 | 147091 |
| 22 | 318313 |
| 23 | 690837 |
| 24 | 1503351 |
| 25 | 3279445 |
| 26 | 7169907 |
| 27 | 15708485 |
| 28 | 34482475 |
| 29 | 75830981 |
| 30 | 167042763 |
| 31 | 368548926 |
| 32 | 814341362 |
| 33 | 1801867812 |
| 34 | 3992172298 |
| 35 | 8855912464 |
| 36 | 19668236110 |