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A090727 as a simple table

na(n)
02
116
2254
34048
464514
51028176
616386302
7261152656
84162056194
966331746448
101057145886974
1116848002445136
12268510893235202
134279326289318096
1468200709735854334
151086932029484351248
1617322711762013765634
17276076456162735898896

[2,16,254,4048,64514,1028176,16386302,261152656,
 4162056194,66331746448,1057145886974,
 16848002445136,268510893235202,4279326289318096,
 68200709735854334,1086932029484351248,
 17322711762013765634,276076456162735898896]