T(n,k)=Number of nXk 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

A229412

T(n,k)=Number of nXk 0..3 arrays avoiding 11 horizontally, 22 vertically, 33 antidiagonally and 00 diagonally.

Terms

    a(0) =4a(1) =15a(2) =15a(3) =57a(4) =163a(5) =57a(6) =216a(7) =1756a(8) =1756a(9) =216a(10) =819a(11) =18712a(12) =53538a(13) =18712a(14) =819a(15) =3105a(16) =199595a(17) =1629298a(18) =1629298a(19) =199595a(20) =3105a(21) =11772a(22) =2127718a(23) =49788258a(24) =142475606a(25) =49788258a(26) =2127718a(27) =11772a(28) =44631a(29) =22684613

External references