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A189546 as a simple table

na(n)
14
28
328
472
5152
6264
7432
8660
9968
101352
111832
122400
133084
143880
154808
165876
177100
188472
1910020
2011736
2113648
2215748
2318064
2420576
2523328
2626304
2729536
2833012
2936764
3040768
3145068
3249656
3354556
3459756
3565292
3671148
3777360
3883908
3990828
4098100

[4,8,28,72,152,264,432,660,968,1352,1832,2400,
 3084,3880,4808,5876,7100,8472,10020,11736,13648,
 15748,18064,20576,23328,26304,29536,33012,36764,
 40768,45068,49656,54556,59756,65292,71148,77360,
 83908,90828,98100]