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A160616 as a simple table

na(n)
01
11
21
33
41
515
645
7105
8315
9405
104725
11155925
12467775
1396525
1442567525
15638512875
1630405375
1710854718875
1897692469875
19618718975875
20189403768125
21194896477400625
22238206805711875
237044115540336875
248701554491004375

[1,1,1,3,1,15,45,105,315,405,4725,155925,467775,
 96525,42567525,638512875,30405375,10854718875,
 97692469875,618718975875,189403768125,
 194896477400625,238206805711875,7044115540336875,
 8701554491004375]