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A155305 as a simple table

na(n)
41
57
625
764
8217
91298
1010738
1190390
12827265
139950319
14159818687
153209355205
1675527888278
172156343784054

[1,7,25,64,217,1298,10738,90390,827265,9950319,
 159818687,3209355205,75527888278,2156343784054]