Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

A305010

Number of nX3 0..1 arrays with every element unequal to 1, 2, 4, 5 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =11a(2) =14a(3) =31a(4) =99a(5) =206a(6) =455a(7) =1321a(8) =3108a(9) =7353a(10) =19511a(11) =48532a(12) =118463a(13) =303897a(14) =765930a(15) =1903657a(16) =4822199a(17) =12178658a(18) =30524501a(19) =77018757a(20) =194412396a(21) =489021459a(22) =1232650101a(23) =3109425604a(24) =7832328261a(25) =19739728551a(26) =49774544636a(27) =125440149679

External references