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A081068 as a simple table

na(n)
01
14
225
3169
41156
57921
654289
7372100
82550409
917480761
10119814916
11821223649
125628750625
1338580030724
14264431464441
151812440220361
1612422650078084
1785146110326225
18583600122205489
194000054745112196
2027416783093579881

[1,4,25,169,1156,7921,54289,372100,2550409,
 17480761,119814916,821223649,5628750625,
 38580030724,264431464441,1812440220361,
 12422650078084,85146110326225,583600122205489,
 4000054745112196,27416783093579881]