Coefficient of x in the reduction of the polynomial x^(2*n) + x^n + 1 by x^3 -> x + 1.

Terms

a(0) =0a(1) =1a(2) =1a(3) =3a(4) =4a(5) =6a(6) =11a(7) =18a(8) =31a(9) =53a(10) =91a(11) =158a(12) =274a(13) =477a(14) =832a(15) =1453a(16) =2541a(17) =4447a(18) =7788a(19) =13646a(20) =23919a(21) =41938a(22) =73547a(23) =129001a(24) =226295a(25) =397006a(26) =696546a(27) =1222153a(28) =2144464a(29) =3762921