The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 2 |
| 5 | 1 |
| 6 | 15 |
| 7 | 6 |
| 8 | 3 |
| 9 | 1 |
| 10 | 96 |
| 11 | 36 |
| 12 | 9 |
| 13 | 4 |
| 14 | 1 |
| 15 | 735 |
| 16 | 258 |
| 17 | 63 |
| 18 | 12 |
| 19 | 5 |
| 20 | 1 |
| 21 | 6447 |
| 22 | 2190 |
| 23 | 492 |
| 24 | 96 |
| 25 | 15 |
| 26 | 6 |
| 27 | 1 |
| 28 | 63120 |
| 29 | 20988 |
| 30 | 4545 |
| 31 | 804 |
| 32 | 135 |
| 33 | 18 |
| 34 | 7 |
| 35 | 1 |
| 36 | 677739 |
| 37 | 222042 |
| 38 | 46935 |
| 39 | 7980 |
| 40 | 1200 |
| 41 | 180 |
| 42 | 21 |
| 43 | 8 |
| 44 | 1 |
| 45 | 7878921 |
| 46 | 2554890 |
| 47 | 530562 |
| 48 | 87960 |
| 49 | 12675 |
| 50 | 1686 |
| 51 | 231 |
| 52 | 24 |
| 53 | 9 |
| 54 | 1 |
[1,1,1,3,2,1,15,6,3,1,96,36,9,4,1,735,258,63,12,5, 1,6447,2190,492,96,15,6,1,63120,20988,4545,804, 135,18,7,1,677739,222042,46935,7980,1200,180,21,8, 1,7878921,2554890,530562,87960,12675,1686,231,24, 9,1] |