a(n) = 2*a(n-1) - 10*a(n-2), with a(0) = 0, a(1) = 1.

Terms

a(0) =0a(1) =1a(2) =2a(3) =-6a(4) =-32a(5) =-4a(6) =312a(7) =664a(8) =-1792a(9) =-10224a(10) =-2528a(11) =97184a(12) =219648a(13) =-532544a(14) =-3261568a(15) =-1197696a(16) =30220288a(17) =72417536a(18) =-157367808a(19) =-1038910976a(20) =-504143872a(21) =9380822016a(22) =23803082752a(23) =-46202054656a(24) =-330434936832a(25) =-198849327104