The hexomegisiduon is equal to M(M(M(6,3),3),3), using the Hyper-Moser notation M(m,n) for m inside n+2-gon. The term was coined by Aarex Tiaokhiao. In the up-arrow notation, Hexomegisiduon is is between \(6 \uparrow^{4} 4\) and \(6 \uparrow^{4} 5\).