Declension table of ?trayodaśaka

Neuter	Singular	Dual	Plural
Nominative	trayodaśakam	trayodaśake	trayodaśakāni
Vocative	trayodaśaka	trayodaśake	trayodaśakāni
Accusative	trayodaśakam	trayodaśake	trayodaśakāni
Instrumental	trayodaśakena	trayodaśakābhyām	trayodaśakaiḥ
Dative	trayodaśakāya	trayodaśakābhyām	trayodaśakebhyaḥ
Ablative	trayodaśakāt	trayodaśakābhyām	trayodaśakebhyaḥ
Genitive	trayodaśakasya	trayodaśakayoḥ	trayodaśakānām
Locative	trayodaśake	trayodaśakayoḥ	trayodaśakeṣu

Compound trayodaśaka -

Adverb -trayodaśakam -trayodaśakāt