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A164895 as a simple table

na(n)
13
27
360
4121
5973
615577
762310
8498486
93987893
1015951575
11127612605
122041801688
1332668827017
14261350616143
154181609858297
1616726439433191
1766905757732766
18267623030931067
194281968494897080
2034255747959176644
21274045983673413158
221096183934693652634

[3,7,60,121,973,15577,62310,498486,3987893,
 15951575,127612605,2041801688,32668827017,
 261350616143,4181609858297,16726439433191,
 66905757732766,267623030931067,4281968494897080,
 34255747959176644,274045983673413158,
 1096183934693652634]