The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 5 |
| 5 | 1 |
| 6 | 0 |
| 7 | 5 |
| 8 | 10 |
| 9 | 1 |
| 10 | 0 |
| 11 | 5 |
| 12 | 60 |
| 13 | 15 |
| 14 | 1 |
| 15 | 0 |
| 16 | 5 |
| 17 | 160 |
| 18 | 165 |
| 19 | 20 |
| 20 | 1 |
| 21 | 0 |
| 22 | 5 |
| 23 | 360 |
| 24 | 1215 |
| 25 | 320 |
| 26 | 25 |
| 27 | 1 |
| 28 | 0 |
| 29 | 5 |
| 30 | 760 |
| 31 | 5565 |
| 32 | 3920 |
| 33 | 525 |
| 34 | 30 |
| 35 | 1 |
| 36 | 0 |
| 37 | 5 |
| 38 | 1560 |
| 39 | 21015 |
| 40 | 35120 |
| 41 | 9025 |
| 42 | 780 |
| 43 | 35 |
| 44 | 1 |
| 45 | 0 |
| 46 | 5 |
| 47 | 3160 |
| 48 | 72165 |
| 49 | 229520 |
| 50 | 123525 |
| 51 | 17280 |
| 52 | 1085 |
| 53 | 40 |
| 54 | 1 |
[1,0,1,0,5,1,0,5,10,1,0,5,60,15,1,0,5,160,165,20, 1,0,5,360,1215,320,25,1,0,5,760,5565,3920,525,30, 1,0,5,1560,21015,35120,9025,780,35,1,0,5,3160, 72165,229520,123525,17280,1085,40,1] |