T(n,k)=Number of nXk arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 nXk array.

A217999

T(n,k)=Number of nXk arrays of the minimum or maximum value of corresponding elements and their horizontal and vertical neighbors in a random 0..2 nXk array.

Terms

    a(0) =3a(1) =9a(2) =9a(3) =25a(4) =81a(5) =25a(6) =81a(7) =729a(8) =729a(9) =81a(10) =241a(11) =6561a(12) =19665a(13) =6561a(14) =241a(15) =719a(16) =59049a(17) =531143a(18) =531143a(19) =59049a(20) =719a(21) =2181a(22) =531441a(23) =14345273a(24) =43046713a(25) =14345273a(26) =531441a(27) =2181a(28) =6543a(29) =4782969

External references