First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 20", based on the 5-celled von Neumann neighborhood.
A269714
First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 20", based on the 5-celled von Neumann neighborhood.
Terms
- a(0) =3a(1) =4a(2) =4a(3) =8a(4) =4a(5) =20a(6) =-16a(7) =24a(8) =4a(9) =48a(10) =-48a(11) =48a(12) =8a(13) =100a(14) =-152a(15) =56a(16) =4a(17) =112a(18) =-112a(19) =112a(20) =8a(21) =224a(22) =-344a(23) =112a(24) =8a(25) =224a(26) =-224a(27) =224a(28) =16a(29) =452
External references
- oeis: A269714