const int bytesX[totalNumberOfMatrices][8] = { {127, 191, 223, 239, 247, 251, 253, 254},
{127, 191, 223, 239, 247, 251, 253, 254},
{254, 253, 251, 247, 239, 223, 191, 127},
{254, 253, 251, 247, 239, 223, 191, 127},
};
All those values would fit in a byte array, cutting the array size in half.