HS48: input_dim: 48^2 = 2304, dense_size = 812

seq = Sequential()
seq.add(Dense(dense_size, input_shape=(input_dim,), 
                activation='relu', kernel_initializer='lecun_uniform'))
seq.add(Dropout(0.1))
seq.add(Dense((dense_size*2)/3, 
                activation='relu', kernel_initializer='lecun_uniform'))
seq.add(Dropout(0.1))
seq.add(Dense(dense_size/4, 
                activation='relu', kernel_initializer='lecun_uniform'))
# add
seq.add(Dense((dense_size*2)/3, 
                activation='relu', kernel_initializer='lecun_uniform'))
seq.add(Dropout(0.1))
seq.add(Dense(dense_size, 
                activation='relu', kernel_initializer='lecun_uniform'))