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