Declension table of ?ardhatrayodaśa

Masculine	Singular	Dual	Plural
Nominative	ardhatrayodaśaḥ	ardhatrayodaśau	ardhatrayodaśāḥ
Vocative	ardhatrayodaśa	ardhatrayodaśau	ardhatrayodaśāḥ
Accusative	ardhatrayodaśam	ardhatrayodaśau	ardhatrayodaśān
Instrumental	ardhatrayodaśena	ardhatrayodaśābhyām	ardhatrayodaśaiḥ ardhatrayodaśebhiḥ
Dative	ardhatrayodaśāya	ardhatrayodaśābhyām	ardhatrayodaśebhyaḥ
Ablative	ardhatrayodaśāt	ardhatrayodaśābhyām	ardhatrayodaśebhyaḥ
Genitive	ardhatrayodaśasya	ardhatrayodaśayoḥ	ardhatrayodaśānām
Locative	ardhatrayodaśe	ardhatrayodaśayoḥ	ardhatrayodaśeṣu

Compound ardhatrayodaśa -

Adverb -ardhatrayodaśam -ardhatrayodaśāt