Number of 4 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.

A086114

Number of 4 X n (0,1) matrices such that each row and each column is nondecreasing or nonincreasing.

Terms

    a(0) =8a(1) =64a(2) =216a(3) =528a(4) =1080a(5) =1968a(6) =3304a(7) =5216a(8) =7848a(9) =11360a(10) =15928a(11) =21744a(12) =29016a(13) =37968a(14) =48840a(15) =61888a(16) =77384a(17) =95616a(18) =116888a(19) =141520a(20) =169848a(21) =202224a(22) =239016a(23) =280608a(24) =327400a(25) =379808a(26) =438264a(27) =503216a(28) =575128a(29) =654480

External references