21102313

Properties

Appears in sequences

• Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=12A146018
• Number of n X n binary arrays symmetric about the diagonal and under 90-degree rotation with all ones connected only in a 2 X 4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=26A146020
• Prime numbersat n=1336026