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A228886 as a simple table
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 8 |
| 7 | 3 |
| 8 | 24 |
| 9 | 78 |
| 10 | 1164 |
| 11 | 34 |
| 12 | 4021156 |
| 13 | 400 |
| 14 | 87180 |
| 15 | 2499480 |
| 16 | 7509358 |
| 17 | 1700352 |
| 18 | 39982182134232 |
| 19 | 1427688 |
| 20 | 212987263960 |
| 21 | 9533487948 |
| 22 | 36638961135462 |
| 23 | 29317847040 |
| 24 | 30258969747586970112 |
| 25 | 1655088666624 |
[1,0,1,0,1,8,3,24,78,1164,34,4021156,400,87180, 2499480,7509358,1700352,39982182134232,1427688, 212987263960,9533487948,36638961135462, 29317847040,30258969747586970112,1655088666624] |