Diptagama 28.7

28.7

madhyamaṃ ṣoḍaśapadaṃ bāhyamekāvṛtaṃ tyajet
aṣṭadvārāṇi saṃkalpya caturviṃśatpadaṃ bhavet

One should leave the middle sixteen squares, and the outer single circuit.
Assigning eight doorways, twenty-four squares will be [arranged];