Net gain in number of ON cells at stage n of the cellular automaton described in A079317.

Terms

a(0) =0a(1) =1a(2) =4a(3) =0a(4) =12a(5) =-8a(6) =20a(7) =-8a(8) =44a(9) =-40a(10) =52a(11) =-40a(12) =76a(13) =-64a(14) =100a(15) =-64a(16) =172a(17) =-168a(18) =180a(19) =-168a(20) =204a(21) =-192a(22) =228a(23) =-192a(24) =300a(25) =-288a(26) =324a(27) =-288a(28) =396a(29) =-360