Declension table of ?saptadaśaka

Neuter	Singular	Dual	Plural
Nominative	saptadaśakam	saptadaśake	saptadaśakāni
Vocative	saptadaśaka	saptadaśake	saptadaśakāni
Accusative	saptadaśakam	saptadaśake	saptadaśakāni
Instrumental	saptadaśakena	saptadaśakābhyām	saptadaśakaiḥ
Dative	saptadaśakāya	saptadaśakābhyām	saptadaśakebhyaḥ
Ablative	saptadaśakāt	saptadaśakābhyām	saptadaśakebhyaḥ
Genitive	saptadaśakasya	saptadaśakayoḥ	saptadaśakānām
Locative	saptadaśake	saptadaśakayoḥ	saptadaśakeṣu

Compound saptadaśaka -

Adverb -saptadaśakam -saptadaśakāt