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 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 2 |
| 9 | 1 |
| 10 | 4 |
| 11 | 2 |
| 12 | 9 |
| 13 | 6 |
| 14 | 21 |
| 15 | 18 |
| 16 | 48 |
| 17 | 50 |
| 18 | 114 |
| 19 | 135 |
| 20 | 277 |
| 21 | 358 |
| 22 | 681 |
| 23 | 935 |
| 24 | 1693 |
| 25 | 2425 |
| 26 | 4235 |
| 27 | 6258 |
| 28 | 10643 |
| 29 | 16085 |
| 30 | 26852 |
| 31 | 41226 |
| 32 | 67921 |
| 33 | 105456 |
| 34 | 172125 |
| 35 | 269375 |
| 36 | 436785 |
| 37 | 687409 |
| 38 | 1109411 |
| 39 | 1752966 |
| 40 | 2819711 |
| 41 | 4468025 |
| 42 | 7170045 |
| 43 | 11384240 |
| 44 | 18238260 |
| 45 | 28999047 |