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A048897 as a simple table

na(n)
11
25
31
445
515
61
7585
8255
930
101
119945
125175
13825
1450
151
16208845
17123795
1824150

[1,5,1,45,15,1,585,255,30,1,9945,5175,825,50,1,
 208845,123795,24150]