Number of disconnected 3 X n binary matrices.

Terms

a(0) =0a(1) =1a(2) =11a(3) =102a(4) =882a(5) =7295a(6) =58533a(7) =459484a(8) =3547860a(9) =27043405a(10) =204016879a(11) =1526141666a(12) =11336059046a(13) =83703379691a(14) =614911337833