The horse saddle will not craft.

What I expected to happen was for it to pop up after i arranged the items correctly

What actually happened was that I arranged the items and looked for it to be in the receiving side of the crafting table but it didn't show up.
L L L
1. put leather in like this L L O
saddle should be here
L L L !
2. then put iron in like this. L I L O
I I