Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A301326

Number of nX4 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =10a(2) =18a(3) =45a(4) =143a(5) =414a(6) =1481a(7) =5062a(8) =17879a(9) =62112a(10) =217402a(11) =764860a(12) =2687915a(13) =9462966a(14) =33320851a(15) =117384939a(16) =413427418a(17) =1456413781a(18) =5131048829a(19) =18077067261a(20) =63688856231a(21) =224392218311a(22) =790594491334

External references