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A245419 as a simple table

na(n)
18
216
340
4112
5296
6792
72112
85632
915016
1040040
11106776
12284736
13759296
142024792
155399440
1614398512
1738396032
18102389416
19273038440
20728102512
211941606696
225177617856
2313806980952
2436818615872
2598182975656
26261821268416
27698190049112
281861840130960

[8,16,40,112,296,792,2112,5632,15016,40040,106776,
 284736,759296,2024792,5399440,14398512,38396032,
 102389416,273038440,728102512,1941606696,
 5177617856,13806980952,36818615872,98182975656,
 261821268416,698190049112,1861840130960]