T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.

A251236

T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock summing to 6 and no 2 X 2 subblock having exactly two nonzero entries.

Terms

    a(0) =38a(1) =110a(2) =110a(3) =322a(4) =270a(5) =322a(6) =966a(7) =694a(8) =694a(9) =966a(10) =2930a(11) =1870a(12) =1592a(13) =1870a(14) =2930a(15) =8982a(16) =5194a(17) =3886a(18) =3886a(19) =5194a(20) =8982a(21) =27714a(22) =14786a(23) =9914a(24) =8686a(25) =9914a(26) =14786a(27) =27714a(28) =85958a(29) =42850

External references