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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 1 |
| 5 | 1 |
| 6 | 9 |
| 7 | 36 |
| 8 | 74 |
| 9 | 75 |
| 10 | 30 |
| 11 | 1 |
| 12 | 32 |
| 13 | 693 |
| 14 | 7720 |
| 15 | 44150 |
| 16 | 138312 |
| 17 | 247380 |
| 18 | 252000 |
| 19 | 136080 |
| 20 | 30240 |
| 21 | 1 |
| 22 | 154 |
| 23 | 25041 |
| 24 | 1500860 |
| 25 | 35815145 |
| 26 | 423545178 |
| 27 | 2868102286 |
| 28 | 12141259200 |
| 29 | 33841521000 |
| 30 | 63823914000 |
| 31 | 82023091920 |
| 32 | 70832361600 |
| 33 | 39351312000 |
| 34 | 12713500800 |
| 35 | 1816214400 |
[1,1,2,1,1,9,36,74,75,30,1,32,693,7720,44150, 138312,247380,252000,136080,30240,1,154,25041, 1500860,35815145,423545178,2868102286,12141259200, 33841521000,63823914000,82023091920,70832361600, 39351312000,12713500800,1816214400] |