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A185640 as a simple table

na(n)
10
2404
3404
4854
55068
6854
710296
856558
956558
1010296
1137844
12678268
131009472
14678268
1537844
16290174
178069858
1825812774
1925812774
208069858
21290174
221362488
2396721922
24574149820
251223338660
26574149820
2796721922
281362488
298774626

[0,404,404,854,5068,854,10296,56558,56558,10296,
 37844,678268,1009472,678268,37844,290174,8069858,
 25812774,25812774,8069858,290174,1362488,96721922,
 574149820,1223338660,574149820,96721922,1362488,
 8774626]