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A072547 as a simple table

na(n)
11
20
32
46
522
680
7296
81106
94166
1015792
1160172
12230252
13884236
143406104
1513154948
1650922986
17197519942
18767502944
192987013068
2011641557716
2145429853652
22177490745984
23694175171648
242717578296116
2510648297329692
2641757352712480

[1,0,2,6,22,80,296,1106,4166,15792,60172,230252,
 884236,3406104,13154948,50922986,197519942,
 767502944,2987013068,11641557716,45429853652,
 177490745984,694175171648,2717578296116,
 10648297329692,41757352712480]