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A005630 as a simple table

na(n)
10
20
30
40
50
60
74
810
934
1096
11284
12782
132226
146208
1517560
1649618
17141500
18405104
191168316
203386538
219875232
2228939944
2385235762
24252159572
25749160544
262234378156
276688358338
2820088296030
2960524845158
30182893018756

[0,0,0,0,0,0,4,10,34,96,284,782,2226,6208,17560,
 49618,141500,405104,1168316,3386538,9875232,
 28939944,85235762,252159572,749160544,2234378156,
 6688358338,20088296030,60524845158,182893018756]