Number of nX3 0..1 arrays with no element equal to more than three of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

A281160

Number of nX3 0..1 arrays with no element equal to more than three of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Terms

    a(0) =0a(1) =5a(2) =40a(3) =477a(4) =3237a(5) =17806a(6) =84443a(7) =363824a(8) =1461206a(9) =5575913a(10) =20472627a(11) =72964149a(12) =253964856a(13) =867114052a(14) =2913619968a(15) =9658923248a(16) =31652960455a(17) =102699696500a(18) =330326674680

External references