A146199 Number of n X n arrays of squares of integers with every (n-2) X (n-2) subblock summing to 6 and every element equal to at least one neighbor.
0, 98, 34778, 290306, 1182610, 3573766, 9017466, 20075266, 40694834, 76649830, 136042186, 229866786, 372638546, 583081894, 884882650, 1307502306, 1887054706, 2667245126
Offset: 4