The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 0 |
| 3 | 12 |
| 4 | 1 |
| 5 | 56 |
| 6 | 0 |
| 7 | 243 |
| 8 | 6 |
| 9 | 992 |
| 10 | 0 |
| 11 | 4041 |
| 12 | 24 |
| 13 | 16264 |
| 14 | 3 |
| 15 | 65280 |
| 16 | 65 |
| 17 | 261636 |
| 18 | 1 |
| 19 | 1047584 |
| 20 | 256 |
| 21 | 4192257 |
| 22 | 0 |
| 23 | 16773120 |
| 24 | 1027 |
| 25 | 67100672 |
| 26 | 1 |
| 27 | 268419076 |
| 28 | 4097 |
| 29 | 1073709056 |
| 30 | 3 |
| 31 | 4294901760 |
| 32 | 16393 |
| 33 | 17179738112 |
| 34 | 2048 |
| 35 | 68719214599 |
| 36 | 69120 |
| 37 | 274877382659 |
| 38 | 1032 |
[1,2,0,12,1,56,0,243,6,992,0,4041,24,16264,3, 65280,65,261636,1,1047584,256,4192257,0,16773120, 1027,67100672,1,268419076,4097,1073709056,3, 4294901760,16393,17179738112,2048,68719214599, 69120,274877382659,1032] |