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A181478 as a simple table

na(n)
01
16
236
3146
4561
51812
65552
715372
840677
9100562
10239316
11541926
121188341
132507736
145149056
1510251560
1619935135
1737790610
1870187260
19127580310
20227779695
21399218820
22688680720
231169024220
241956567795
253228473430

[1,6,36,146,561,1812,5552,15372,40677,100562,
 239316,541926,1188341,2507736,5149056,10251560,
 19935135,37790610,70187260,127580310,227779695,
 399218820,688680720,1169024220,1956567795,
 3228473430]