the 7-gramm is called a heptagramm and it's a gnostic mystical star
Gnosticism developped around the coasts of eastern Mediterranean, mainly in the years 100-300 A.D. It was a syncretistic and sectarian movement, basically trying to reconcile the Christian and the Oriental religions, albeit with a strong puritanistic bias.
Certain Gnostics regarded the Old Testament's God as an evil being who had created an evil world (and evil Jahve really was for the poor Philistines). According to Gnosticism everything physical or earthly is evil, especially the eating of meat and sexual pleasures, but sometimes even normal bathing and washing habits. What a happy bunch they must have been.
the 9-gram or enneagram is the symbol of divine protection
It is also used in Christian symbolism to indicate the nine gifts of the spirit: love, happiness, peace, patience, leniency, benevolence, loyalty, humbleness, and temperance.
I think OL meant to use the enneagram but it didn't fit with the album's general idea...I don't think the 7-gram behind the 7 in the orphaned triangle has a gnostic meaning to it.
then again maybe it represents the ballance between god and evil in god...a tango between god and satan if you will