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A190020 as a simple table

na(n)
10
20
324
4236
51148
63932
710760
825392
953576
10103824
11188104
12322852
13529116
14835028
151275360
161893496
172742208
183886568
195402448
207381316
219928860
2213168484
2317243896
2422319864
2528579720
2636237928
2745532720
2856732668

[0,0,24,236,1148,3932,10760,25392,53576,103824,
 188104,322852,529116,835028,1275360,1893496,
 2742208,3886568,5402448,7381316,9928860,13168484,
 17243896,22319864,28579720,36237928,45532720,
 56732668]