def checkTriangle(r, c, bottom):
    height = bottom//2 + 1
    for h in range(height):
        for b in range(h, bottom - h):
            if grid[r -  h][c + b] != '#':
                return False
    
    return True

    
number = int(input())
if number % 2 == 1:
    maxBottom = number
else:
    maxBottom = number - 1

grid = []
for i in range(number):
    grid.append(input())

count = 0

for row in range(number):
    for column in range(number):
        for i in range(maxBottom, 0, -2):
            if (number - column) < i:
                continue

            h = i//2 + 1
            
            if row + 1 < h: 
                continue

            if checkTriangle(row, column, i) == True:
                count += 1

print(count)