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A172064 as a simple table

na(n)
01
18
246
3230
41068
54744
620476
786662
8361711
91494384
106126818
1124972326
12101320712
13409609664
141651162688
156640469816
1626655382802
17106830738224
18427612715516
191709790470780
206830461107736
2127266848437608

[1,8,46,230,1068,4744,20476,86662,361711,1494384,
 6126818,24972326,101320712,409609664,1651162688,
 6640469816,26655382802,106830738224,427612715516,
 1709790470780,6830461107736,27266848437608]