Number of tilings of an 8 X n rectangle using 2*n copies of the disconnected shape [oo__oo].

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =5a(7) =11a(8) =36a(9) =69a(10) =112a(11) =163a(12) =260a(13) =425a(14) =897a(15) =1845a(16) =3910a(17) =7524a(18) =13683a(19) =23675a(20) =41741a(21) =74882a(22) =141758a(23) =272059a(24) =525251a(25) =992342a(26) =1841482a(27) =3361173a(28) =6142594a(29) =11291891