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A223028 as a simple table

na(n)
10
26
316
458
5136
6352
7768
81752
93680
107904
1116256
1233824
1368736
14140544
15283648
16574336
171154560
182324992
194663296
209361920
2118753536
2237584896
2375235328
24150640640
25301424640
26603217920
271206747136
282414288896
294829249536

[0,6,16,58,136,352,768,1752,3680,7904,16256,33824,
 68736,140544,283648,574336,1154560,2324992,
 4663296,9361920,18753536,37584896,75235328,
 150640640,301424640,603217920,1206747136,
 2414288896,4829249536]