1441793domain: NAppears in sequencesa(n) = 11*2^n + 1.at n=17A083683a(n) = 2*a(n-1) - 1 for n>1, a(1)=23.at n=16A122041a(n) is that generation of the rule-30 1D cellular automaton started from a single ON cell in which n successive OFF cells appears for the first time after a(n-1).at n=42A319606