T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.

A301669

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2 or 4 horizontally or vertically adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =2a(7) =10a(8) =10a(9) =2a(10) =3a(11) =23a(12) =30a(13) =23a(14) =3a(15) =5a(16) =61a(17) =118a(18) =118a(19) =61a(20) =5a(21) =8a(22) =162a(23) =407a(24) =564a(25) =407a(26) =162a(27) =8a(28) =13a(29) =421

External references