Don't worry, I didn't say anything bad about your english
Let me say something related:
The product of 4 consecutive
odd numbers plus 16 is always a perfect square.
Some examples:
$11*13*15*17 + 16 = 36481 = 191^2$
$3*5*7*9 + 16 = 961 = 31^2$
$15*17*19*21+16 = 101761 = 319^2$
What do you think of this? It's a very similar result, but I haven't found it on the internet.