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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 1 |
| 6 | 4 |
| 7 | 3 |
| 8 | 8 |
| 9 | 11 |
| 10 | 20 |
| 11 | 31 |
| 12 | 64 |
| 13 | 105 |
| 14 | 202 |
| 15 | 367 |
| 16 | 696 |
| 17 | 1285 |
| 18 | 2452 |
| 19 | 4599 |
| 20 | 8776 |
| 21 | 16651 |
| 22 | 31838 |
| 23 | 60787 |
| 24 | 116640 |
| 25 | 223697 |
| 26 | 430396 |
| 27 | 828525 |
| 28 | 1598228 |
| 29 | 3085465 |
| 30 | 5966000 |
| 31 | 11545611 |
| 32 | 22371000 |
| 33 | 43383571 |
| 34 | 84217616 |
| 35 | 163617805 |
| 36 | 318150720 |
| 37 | 619094385 |
| 38 | 1205614054 |
| 39 | 2349384031 |
| 40 | 4581315968 |