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A115434 as a simple table

na(n)
18
216
31337032
42084503
52953232
64023943
71330033613070195328
84036108433661798551
98283744867954114232
106247320195351414276186411625291
119452080202814205132771066881607

[8,16,1337032,2084503,2953232,4023943,
 1330033613070195328,4036108433661798551,
 8283744867954114232,
 6247320195351414276186411625291,
 9452080202814205132771066881607]