http://mathworld.i2p/BarkerCode.html
(OEIS A005418 ), while the numbers of Barker codes of order , 3, ... are 2, 1, 2, 1, 0, 1, 0, 0, 0, 1, 0, 1, and 0 for all higher (OEIS A091704 ). Portions of this entry contributed by David Terr References Barker, R.