Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.

A223470

Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..2 order.

Terms

    a(0) =10a(1) =58a(2) =522a(3) =1341a(4) =6708a(5) =15374a(6) =61477a(7) =142610a(8) =503050a(9) =1229381a(10) =4007618a(11) =10383806a(12) =32253501a(13) =87752662a(14) =265341502a(15) =747479421a(16) =2231002754a(17) =6428099474a(18) =19090887233a(19) =55776955238a(20) =165509837454a(21) =487703210601

External references