210769267

Appears in sequences

• Number of n X n binary arrays with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=8A146015
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=18A146017
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation.at n=19A146017