Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4.

A196926

Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =17a(4) =65a(5) =231a(6) =833a(7) =3023a(8) =10988a(9) =39907a(10) =144974a(11) =526573a(12) =1912811a(13) =6948283a(14) =25239895a(15) =91684511a(16) =333046794a(17) =1209801776a(18) =4394640748a(19) =15963659925a(20) =57988462172a(21) =210644781240a(22) =765173326354

External references