The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 0 |
| 8 | 0 |
| 9 | 4 |
| 10 | 4 |
| 11 | 0 |
| 12 | 0 |
| 13 | 0 |
| 14 | 16 |
| 15 | 12 |
| 16 | 0 |
| 17 | 0 |
| 18 | 0 |
| 19 | 4 |
| 20 | 72 |
| 21 | 36 |
| 22 | 0 |
| 23 | 0 |
| 24 | 0 |
| 25 | 0 |
| 26 | 36 |
| 27 | 324 |
| 28 | 144 |
| 29 | 0 |
| 30 | 0 |
| 31 | 0 |
| 32 | 0 |
| 33 | 0 |
| 34 | 324 |
| 35 | 1728 |
| 36 | 576 |
| 37 | 0 |
| 38 | 0 |
| 39 | 0 |
| 40 | 0 |
| 41 | 0 |
| 42 | 36 |
| 43 | 2592 |
| 44 | 9216 |
| 45 | 2880 |
| 46 | 0 |
| 47 | 0 |
| 48 | 0 |
| 49 | 0 |
| 50 | 0 |
| 51 | 0 |
| 52 | 576 |
| 53 | 20736 |
| 54 | 57600 |
| 55 | 14400 |
| 56 | 0 |
| 57 | 0 |
| 58 | 0 |
| 59 | 0 |
| 60 | 0 |
| 61 | 0 |
| 62 | 0 |
| 63 | 9216 |
| 64 | 172800 |
| 65 | 360000 |
| 66 | 86400 |
| 67 | 0 |
| 68 | 0 |
| 69 | 0 |
| 70 | 0 |
| 71 | 0 |
| 72 | 0 |
| 73 | 0 |
| 74 | 576 |
| 75 | 115200 |
| 76 | 1440000 |
| 77 | 2592000 |
| 78 | 518400 |
[1,0,1,0,1,2,0,0,4,4,0,0,0,16,12,0,0,0,4,72,36,0, 0,0,0,36,324,144,0,0,0,0,0,324,1728,576,0,0,0,0,0, 36,2592,9216,2880,0,0,0,0,0,0,576,20736,57600, 14400,0,0,0,0,0,0,0,9216,172800,360000,86400,0,0, 0,0,0,0,0,576,115200,1440000,2592000,518400] |