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A160049 as a simple table

na(n)
11
21
31
43
56
65
710
835
9140
10126
111260
121155
1313860
1412870
1512012
1645045
17360360
18340340
192042040
201939938
21369512
22117572
232586584
247436429
25178474296
26171609900
271487285800
281434168450
2940156716600
3038818159380
311164544781400

[1,1,1,3,6,5,10,35,140,126,1260,1155,13860,12870,
 12012,45045,360360,340340,2042040,1939938,369512,
 117572,2586584,7436429,178474296,171609900,
 1487285800,1434168450,40156716600,38818159380,
 1164544781400]