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A232139 as a simple table

na(n)
144
2728
310956
4169692
52616952
640399768
7623543776
89624373808
9148550587192
102292857494812
1135389922134468
12546238342870352
138431109896279836
14130132963416612180
152008583492065392256
1631002196055330559468

[44,728,10956,169692,2616952,40399768,623543776,
 9624373808,148550587192,2292857494812,
 35389922134468,546238342870352,8431109896279836,
 130132963416612180,2008583492065392256,
 31002196055330559468]