Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.

A297851

Number of n X n 0..1 arrays with every element equal to 1, 2 or 4 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =3a(2) =15a(3) =30a(4) =45a(5) =131a(6) =181a(7) =298a(8) =430a(9) =1022a(10) =1429a(11) =2164a(12) =2135a(13) =4620a(14) =3680a(15) =9110a(16) =11981a(17) =9540a(18) =87199a(19) =22330a(20) =77938a(21) =182912a(22) =34081

External references