A051251 Number of self-complementary 3-plexes.
1, 1, 1, 0, 0, 0, 0, 128, 16384, 33554432, 1466015678464, 0, 0, 0, 0, 53919893334301279589334030174039266539571147379908773492703549718528, 63657374260452690195888927762793067532858387480466469420624374174610161798791164116074496
Offset: 1