Number of nX4 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

A298898

Number of nX4 0..1 arrays with every element equal to 3, 4, 5, 6 or 8 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =2a(2) =2a(3) =4a(4) =10a(5) =24a(6) =56a(7) =142a(8) =346a(9) =874a(10) =2210a(11) =5640a(12) =14440a(13) =37224a(14) =96128a(15) =249108a(16) =646710a(17) =1681772a(18) =4378614a(19) =11411374a(20) =29760404a(21) =77658384a(22) =202729956a(23) =529406180a(24) =1382821596a(25) =3612643922a(26) =9439431124a(27) =24666860228a(28) =64464076954a(29) =168480273482

External references