Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A316415

Number of nX3 0..1 arrays with every element unequal to 0, 1, 2, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =4a(1) =5a(2) =14a(3) =27a(4) =66a(5) =180a(6) =484a(7) =1261a(8) =3346a(9) =8912a(10) =23666a(11) =62840a(12) =166959a(13) =443676a(14) =1178829a(15) =3132091a(16) =8322214a(17) =22112722a(18) =58754687a(19) =156114566a(20) =414806153a(21) =1102165608a(22) =2928521067a(23) =7781259792a(24) =20675285518a(25) =54935502703a(26) =145967000962a(27) =387843280136

External references