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A155256 as a simple table

na(n)
41
57
625
755
8244
91426
1010764
1197667
121037959
1313184770
14219939446
154610420436
16119066459836

[1,7,25,55,244,1426,10764,97667,1037959,13184770,
 219939446,4610420436,119066459836]