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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 1 |
| 5 | 16 |
| 6 | 1 |
| 7 | 45 |
| 8 | 1 |
| 9 | 121 |
| 10 | 1 |
| 11 | 320 |
| 12 | 1 |
| 13 | 841 |
| 14 | 1 |
| 15 | 2205 |
| 16 | 1 |
| 17 | 5776 |
| 18 | 1 |
| 19 | 15125 |
| 20 | 1 |
| 21 | 39601 |
| 22 | 1 |
| 23 | 103680 |
| 24 | 1 |
| 25 | 271441 |
| 26 | 1 |
| 27 | 710645 |
| 28 | 1 |
| 29 | 1860496 |
| 30 | 1 |
| 31 | 4870845 |
| 32 | 1 |
| 33 | 12752041 |
| 34 | 1 |
| 35 | 33385280 |
| 36 | 1 |
| 37 | 87403801 |
| 38 | 1 |
| 39 | 228826125 |
| 40 | 1 |
[1,1,1,5,1,16,1,45,1,121,1,320,1,841,1,2205,1, 5776,1,15125,1,39601,1,103680,1,271441,1,710645,1, 1860496,1,4870845,1,12752041,1,33385280,1, 87403801,1,228826125,1] |