Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

A298656

Number of nX4 0..1 arrays with every element equal to 1, 2, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

Terms

    a(0) =2a(1) =13a(2) =19a(3) =40a(4) =85a(5) =173a(6) =322a(7) =635a(8) =1325a(9) =2806a(10) =5877a(11) =12293a(12) =25318a(13) =52348a(14) =110032a(15) =230666a(16) =481721a(17) =1008645a(18) =2105418a(19) =4397869a(20) =9221888a(21) =19306816a(22) =40379476a(23) =84574182a(24) =176999321a(25) =370432095a(26) =776067635a(27) =1625005774a(28) =3401774504a(29) =7125184125

External references