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

A298489

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

Terms

    a(0) =4a(1) =13a(2) =20a(3) =27a(4) =43a(5) =70a(6) =106a(7) =169a(8) =276a(9) =444a(10) =720a(11) =1183a(12) =1947a(13) =3207a(14) =5311a(15) =8826a(16) =14681a(17) =24474a(18) =40897a(19) =68419a(20) =114596a(21) =192212a(22) =322715a(23) =542258a(24) =911962a(25) =1534860a(26) =2584781a(27) =4355511a(28) =7343271a(29) =12386305

External references