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A202925 as a simple table

na(n)
16
252
3352
42444
517508
6124340
7872940
86112832
942822036
10299718840
112094967284
1214630909636
13102130256404
14712606093984
154970091031972
1634652009741528
17241529705097892
181683093292484152
1911726099598816180
2081680440933444532

[6,52,352,2444,17508,124340,872940,6112832,
 42822036,299718840,2094967284,14630909636,
 102130256404,712606093984,4970091031972,
 34652009741528,241529705097892,1683093292484152,
 11726099598816180,81680440933444532]