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A155279 as a simple table

na(n)
41
54
613
728
8131
9610
102469
1115728
12124639
13969461
1410411634
15132835888
161807916253

[1,4,13,28,131,610,2469,15728,124639,969461,
 10411634,132835888,1807916253]