1RB0RF_1RC1RF_1LD0LE_---1LC_1RA1LE_1LC1RB

1RB0RF_1RC1RF_1LD0LE_---1LC_1RA1LE_1LC1RB (bbch) is a probviously non-halting BB(6) cryptid similar to Space Needle.

Analysis

A(x,y) = 0^inf <E 1^x 0 1^y 0^inf

A(2x,y) -> A(3x+y+1,2)
A(2x+3,y) -> A(x,x+y+4)
A(1,y) -> halt

A(x) = A(x-3,2)
p(x) = The largest n such that 2^n divides x

A(x) -> A(x+p(x)+(x/2^p(x)+3)/2) if x/2^p(x)>1
A(2^x) -> halt

A(3) -> A(6) -> A(10) -> A(15) -> A(24) -> A(30) -> A(40) -> A(47) -> A(72) -> ...