319727

Properties

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a one by five or five by one block.at n=8A145964
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a one by five or five by one block.at n=19A145966
• Lesser of twin self primes, i.e., smaller member of the pair of self primes differing by 2.at n=30A380713
• Prime numbersat n=27586