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A190317 as a simple table

na(n)
10
20
38
448
5164
6448
7976
81864
93328
105512
118640
1212984
1318836
1426576
1536584
1649056
1764560
1883640
19106904
20134816
21168004
22206952
23252480
24305360
25366312
26436120
27515864
28605928
29707644
30822120
31950216
321092784
331251784
341427848
351622416
361835968
372070404

[0,0,8,48,164,448,976,1864,3328,5512,8640,12984,
 18836,26576,36584,49056,64560,83640,106904,134816,
 168004,206952,252480,305360,366312,436120,515864,
 605928,707644,822120,950216,1092784,1251784,
 1427848,1622416,1835968,2070404]