Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 721", based on the 5-celled von Neumann neighborhood.
A273446
Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 721", based on the 5-celled von Neumann neighborhood.
Terms
- a(0) =1a(1) =4a(2) =41a(3) =224a(4) =960a(5) =3968a(6) =16128a(7) =65024a(8) =261120a(9) =1046528a(10) =4190208a(11) =16769024a(12) =67092480a(13) =268402688a(14) =1073676288a(15) =4294836224
External references
- oeis: A273446