Number of nX3 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A305170

Number of nX3 0..1 arrays with every element unequal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =5a(2) =4a(3) =46a(4) =151a(5) =543a(6) =2120a(7) =8155a(8) =30205a(9) =115292a(10) =437367a(11) =1652127a(12) =6259372a(13) =23720673a(14) =89793169a(15) =340068226a(16) =1288031893a(17) =4877697803a(18) =18472359472a(19) =69958934289a(20) =264942827367

External references