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 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 3 |
| 10 | 13 |
| 11 | 15 |
| 12 | 15 |
| 13 | 7 |
| 14 | 1 |
| 15 | 1 |
| 16 | 1 |
| 17 | 3 |
| 18 | 13 |
| 19 | 75 |
| 20 | 165 |
| 21 | 357 |
| 22 | 645 |
| 23 | 927 |
| 24 | 1095 |
| 25 | 957 |
| 26 | 627 |
| 27 | 299 |
| 28 | 91 |
| 29 | 15 |
| 30 | 1 |
| 31 | 1 |
| 32 | 1 |
| 33 | 3 |
| 34 | 13 |
| 35 | 75 |
| 36 | 525 |
| 37 | 1827 |
| 38 | 5965 |
| 39 | 18315 |
| 40 | 51885 |
| 41 | 130977 |
| 42 | 304953 |
| 43 | 646373 |
| 44 | 1238601 |
| 45 | 2143065 |
| 46 | 3331429 |
| 47 | 4663967 |
| 48 | 5867703 |