Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 221", based on the 5-celled von Neumann neighborhood.
A270935
Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 221", based on the 5-celled von Neumann neighborhood.
Terms
- a(0) =1a(1) =8a(2) =44a(3) =220a(4) =956a(5) =3964a(6) =16124a(7) =65020a(8) =261116a(9) =1046524a(10) =4190204a(11) =16769020a(12) =67092476a(13) =268402684a(14) =1073676284a(15) =4294836220
External references
- oeis: A270935