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A081071 as a simple table

na(n)
01
116
2121
3841
45776
539601
6271441
71860496
812752041
987403801
10599074576
114106118241
1228143753121
13192900153616
141322157322201
159062201101801
1662113250390416
17425730551631121
182918000611027441
1920000273725560976

[1,16,121,841,5776,39601,271441,1860496,12752041,
 87403801,599074576,4106118241,28143753121,
 192900153616,1322157322201,9062201101801,
 62113250390416,425730551631121,2918000611027441,
 20000273725560976]