Number of nX6 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

A303634

Number of nX6 0..1 arrays with every element unequal to 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =5a(2) =3a(3) =22a(4) =66a(5) =394a(6) =1417a(7) =7706a(8) =33066a(9) =162051a(10) =742361a(11) =3551493a(12) =16462120a(13) =78105973a(14) =365231748a(15) =1722636470a(16) =8082828137a(17) =38044302672a(18) =178718778290a(19) =840640740209

External references