Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

A316540

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 4, 7 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =12a(2) =26a(3) =53a(4) =187a(5) =484a(6) =1262a(7) =3570a(8) =9751a(9) =26557a(10) =72773a(11) =199700a(12) =546815a(13) =1496934a(14) =4102867a(15) =11240497a(16) =30788845a(17) =84352649a(18) =231098249a(19) =633098685a(20) =1734421624a(21) =4751634729a(22) =13017502145a(23) =35662487018a(24) =97700580311a(25) =267659337870

External references