209203

Properties

Appears in sequences

• Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.at n=18A147097
• Lesser of Gridgeman pairs in base 16 in increasing order: pairs of primes palindromic in base 16 which differ only in their middle digits by a difference of 1.at n=8A246872
• Prime numbersat n=18733