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A052530 as a simple table

na(n)
00
12
28
330
4112
5418
61560
75822
821728
981090
10302632
111129438
124215120
1315731042
1458709048
15219105150
16817711552
173051741058
1811389252680
1942505269662
20158631825968
21592022034210
222209456310872
238245803209278
2430773756526240

[0,2,8,30,112,418,1560,5822,21728,81090,302632,
 1129438,4215120,15731042,58709048,219105150,
 817711552,3051741058,11389252680,42505269662,
 158631825968,592022034210,2209456310872,
 8245803209278,30773756526240]