Declension table of ?hāsana

Neuter	Singular	Dual	Plural
Nominative	hāsanam	hāsane	hāsanāni
Vocative	hāsana	hāsane	hāsanāni
Accusative	hāsanam	hāsane	hāsanāni
Instrumental	hāsanena	hāsanābhyām	hāsanaiḥ
Dative	hāsanāya	hāsanābhyām	hāsanebhyaḥ
Ablative	hāsanāt	hāsanābhyām	hāsanebhyaḥ
Genitive	hāsanasya	hāsanayoḥ	hāsanānām
Locative	hāsane	hāsanayoḥ	hāsaneṣu

Compound hāsana -

Adverb -hāsanam -hāsanāt