Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 421", based on the 5-celled von Neumann neighborhood.
A272050
Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 421", based on the 5-celled von Neumann neighborhood.
Terms
- a(0) =1a(1) =8a(2) =40a(3) =180a(4) =788a(5) =3372a(6) =14048a(7) =57208a(8) =231212a(9) =929924a(10) =3725868a(11) =1492500a(12) =59718716a(13) =238943360a(14) =955894516a(15) =3823815736
External references
- oeis: A272050