Half the number of (n+1) X 2 binary arrays with no 2 X 2 subblock containing exactly one 1.

A184189

Half the number of (n+1) X 2 binary arrays with no 2 X 2 subblock containing exactly one 1.

Terms

    a(0) =6a(1) =19a(2) =60a(3) =190a(4) =602a(5) =1908a(6) =6048a(7) =19172a(8) =60776a(9) =192664a(10) =610760a(11) =1936160a(12) =6137792a(13) =19457328a(14) =61681408a(15) =195535392a(16) =619864096a(17) =1965022784a(18) =6229292160a(19) =19747394880a(20) =62600949632a(21) =198450424448a(22) =629105008768

External references