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A203151 as a simple table

na(n)
11
22
35
412
540
6132
7564
82400
912576
1065760
11408960
122540160
1318299520
14131725440
151079205120
168836853760
1781157386240
18745047797760
197582159872000
2077138417664000
21861690783744000
229623448705024000
23117074735382528000

[1,2,5,12,40,132,564,2400,12576,65760,408960,
 2540160,18299520,131725440,1079205120,8836853760,
 81157386240,745047797760,7582159872000,
 77138417664000,861690783744000,9623448705024000,
 117074735382528000]