T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.

A197475

T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =3a(6) =1a(7) =6a(8) =6a(9) =1a(10) =4a(11) =12a(12) =26a(13) =12a(14) =4a(15) =4a(16) =24a(17) =46a(18) =46a(19) =24a(20) =4a(21) =5a(22) =50a(23) =181a(24) =184a(25) =181a(26) =50a(27) =5a(28) =8a(29) =98

External references