[x]{a,b,c} = α_b||([x]{a,b,c-1})

[x]{a,b,1} = [x]{a,b}

α_1(0) = x

α_k|||n(m) = α_k|||n-1^α_k|||n-1(m)(m)

α_n(m) = α_n-1|||m(m)

a|||b = a||(a|||b-1)

a||b = a concatenated to b

α_1(n) = α_1(n-1){α_1(n-1)}α_n-1

a{c}b = a{c-1}(a{c}b-1)

a{0}b = ab

# Category: Nuclear43

## 5 Best BCU Packs to Use

BCU, or Battle Cats Ultimate is a fan-made battle cats stage creator/player. Where you can create stages, cats, enemies, and other things. A pack is the name of the set of things created (cats, enemies, and stages).

## BTDX: What to Play When You Are Bored of 5&6

BTDX is a fan made BTD game made before BTD6 but after BTD5. It features much more content.