Norm of the complex coefficients in 1/(1 - x + (1-2*I)*x^2).

Terms

a(0) =1a(1) =1a(2) =4a(3) =17a(4) =29a(5) =160a(6) =377a(7) =1377a(8) =4468a(9) =13369a(10) =46573a(11) =141440a(12) =469169a(13) =1499329a(14) =4795556a(15) =15600033a(16) =49731901a(17) =161026720a(18) =516993193a(19) =1663865633a(20) =5361647252a(21) =17231870281a(22) =55519546637a(23) =178586104320a(24) =574860647521