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 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 27 |
| 7 | 0 |
| 8 | 1 |
| 9 | 69 |
| 10 | 282 |
| 11 | 0 |
| 12 | 1 |
| 13 | 123 |
| 14 | 1434 |
| 15 | 2050 |
| 16 | 0 |
| 17 | 1 |
| 18 | 195 |
| 19 | 4182 |
| 20 | 20810 |
| 21 | 12405 |
| 22 | 0 |
| 23 | 1 |
| 24 | 273 |
| 25 | 9762 |
| 26 | 103050 |
| 27 | 260235 |
| 28 | 67557 |
| 29 | 0 |
| 30 | 1 |
| 31 | 375 |
| 32 | 19110 |
| 33 | 368130 |
| 34 | 2273505 |
| 35 | 3037167 |
| 36 | 344708 |
| 37 | 0 |
| 38 | 1 |
| 39 | 477 |
| 40 | 34602 |
| 41 | 1042030 |
| 42 | 12775065 |
| 43 | 47922021 |
| 44 | 34229076 |
| 45 | 1686132 |
| 46 | 0 |
| 47 | 1 |
| 48 | 603 |