T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A300546

T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =2a(7) =11a(8) =11a(9) =2a(10) =3a(11) =37a(12) =71a(13) =37a(14) =3a(15) =5a(16) =129a(17) =450a(18) =450a(19) =129a(20) =5a(21) =8a(22) =450a(23) =2879a(24) =5232a(25) =2879a(26) =450a(27) =8a(28) =13a(29) =1568

External references