Number of n X 2 0..4 arrays with no element equal to another within two positions in the same row or column, and new values 0..4 introduced in row major order.

A206353

Number of n X 2 0..4 arrays with no element equal to another within two positions in the same row or column, and new values 0..4 introduced in row major order.

Terms

    a(0) =1a(1) =4a(2) =17a(3) =120a(4) =884a(5) =6558a(6) =48680a(7) =361422a(8) =2683328a(9) =19922214a(10) =147910952a(11) =1098154590a(12) =8153170064a(13) =60532632918a(14) =449420225720

External references