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A160608 as a simple table

na(n)
01
11
21
31
41
55
65
735
85
935
10175
111925
12275
1325025
14175175
15125125
16875875
1714889875
1814889875
19282625
201414538125
219901766875
222222845625
232505147019375
242505147019375
2562628675484375
26116310397328125
27814172781296875

[1,1,1,1,1,5,5,35,5,35,175,1925,275,25025,175175,
 125125,875875,14889875,14889875,282625,1414538125,
 9901766875,2222845625,2505147019375,2505147019375,
 62628675484375,116310397328125,814172781296875]