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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 0 |
| 7 | 1 |
| 8 | 9 |
| 9 | 11 |
| 10 | 0 |
| 11 | 1 |
| 12 | 21 |
| 13 | 66 |
| 14 | 50 |
| 15 | 0 |
| 16 | 1 |
| 17 | 45 |
| 18 | 275 |
| 19 | 500 |
| 20 | 274 |
| 21 | 0 |
| 22 | 1 |
| 23 | 93 |
| 24 | 990 |
| 25 | 3250 |
| 26 | 4110 |
| 27 | 1764 |
| 28 | 0 |
| 29 | 1 |
| 30 | 189 |
| 31 | 3311 |
| 32 | 17500 |
| 33 | 38360 |
| 34 | 37044 |
| 35 | 13068 |
| 36 | 0 |
| 37 | 1 |
| 38 | 381 |
| 39 | 10626 |
| 40 | 85050 |
| 41 | 287700 |
| 42 | 469224 |
| 43 | 365904 |
| 44 | 109584 |
| 45 | 0 |
| 46 | 1 |
| 47 | 765 |
| 48 | 33275 |
| 49 | 388500 |
| 50 | 1904574 |
| 51 | 4667544 |
| 52 | 6037416 |
| 53 | 3945024 |
| 54 | 1026576 |
| 55 | 0 |
| 56 | 1 |
| 57 | 1533 |
| 58 | 102630 |
| 59 | 1705250 |
| 60 | 11651850 |
| 61 | 40266828 |
| 62 | 76839840 |
| 63 | 82188000 |
| 64 | 46195920 |
| 65 | 10628640 |