Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 621", based on the 5-celled von Neumann neighborhood.
A273267
Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 621", based on the 5-celled von Neumann neighborhood.
Terms
- a(0) =1a(1) =8a(2) =45a(3) =208a(4) =896a(5) =3652a(6) =14664a(7) =58140a(8) =233932a(9) =933464a(10) =3734428a(11) =14938420a(12) =59764528a(13) =239091748a(14) =956487288a(15) =3825849520
External references
- oeis: A273267