T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal.

A207317

T(n,k)=Number of nXk 0..2 arrays avoiding the pattern z-2 z-1 z in any row, column or nw-to-se diagonal.

Terms

    a(0) =3a(1) =9a(2) =9a(3) =26a(4) =81a(5) =26a(6) =75a(7) =676a(8) =676a(9) =75a(10) =216a(11) =5625a(12) =15390a(13) =5625a(14) =216a(15) =622a(16) =46656a(17) =347502a(18) =347502a(19) =46656a(20) =622a(21) =1791a(22) =386884a(23) =7791488a(24) =21162579a(25) =7791488a(26) =386884a(27) =1791a(28) =5157a(29) =3207681

External references