Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.

A298089

Number of nX4 0..1 arrays with every element equal to 1, 2, 4 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =13a(2) =19a(3) =30a(4) =53a(5) =92a(6) =149a(7) =250a(8) =426a(9) =809a(10) =1456a(11) =2602a(12) =4606a(13) =8096a(14) =14731a(15) =27112a(16) =49118a(17) =88604a(18) =159685a(19) =288458a(20) =526293a(21) =960108a(22) =1742179a(23) =3159153a(24) =5731030a(25) =10414879a(26) =18970871a(27) =34518779a(28) =62715041a(29) =113954032

External references