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 | 0 |
| 5 | 1 |
| 6 | 3 |
| 7 | 1 |
| 8 | 8 |
| 9 | 11 |
| 10 | 15 |
| 11 | 46 |
| 12 | 59 |
| 13 | 127 |
| 14 | 259 |
| 15 | 407 |
| 16 | 888 |
| 17 | 1591 |
| 18 | 2925 |
| 19 | 5896 |
| 20 | 10607 |
| 21 | 20582 |
| 22 | 39446 |
| 23 | 73448 |
| 24 | 142691 |
| 25 | 269777 |
| 26 | 513721 |
| 27 | 988638 |
| 28 | 1876107 |
| 29 | 3600313 |
| 30 | 6893509 |
| 31 | 13165219 |
| 32 | 25288200 |
| 33 | 48408011 |
| 34 | 92824505 |
| 35 | 178248758 |
| 36 | 341801149 |
| 37 | 656641084 |
| 38 | 1261298356 |