Masculine stems ending in -an (paradigm attan-, self):
Sg.
Pl.
Nom.
attā
attāno
Acc.
attānaṃ/attaṃ
attāno
Gen.
attano
attānaṃ
Dat.
attano
attānaṃ
Ins.
attanā/attena
attanehi/attanebhi
Abl.
attanā
attanehi/attanebhi
Loc.
attani
attanesu
Voc.
atta/attā
attāno