User:Wythagoras/Rado's sigma function/BB(5,4)

\(\Sigma(5,4) > 2^{2.4 \cdot 10^{26}}\) 0 _ 2 l 1 0 2 2 r 0 0 1 2 r 1 0 3 2 l 0 1 _ _ r 0 1 2 1 l 1 1 1 1 r 2 1 3 3 l 3 2 _ 3 l 1 2 2 1 r 1 2 1 2 l 2 2 3 _ l 2 3 _ 1 r 3 3 1 _ l 3 3 2 1 r 4 4 1 1 l 4 4 2 2 l 4 4 _ _ r 3 4 3 2 r halt

Explanation
This combines an machine with 3 states and 4 colors, which outputs: 222...2223 (~2.4*10^26 2's) Then for each 2 the number of ones will be duplicated. It uses LittlePeng9's duplication machine.