Number of (n+1) X (1+1) 0..1 arrays colored with the sum of the upper and lower median values of each 2 X 2 subblock.

A236323

Number of (n+1) X (1+1) 0..1 arrays colored with the sum of the upper and lower median values of each 2 X 2 subblock.

Terms

    a(0) =16a(1) =32a(2) =60a(3) =120a(4) =252a(5) =496a(6) =972a(7) =1960a(8) =3980a(9) =7872a(10) =15676a(11) =31512a(12) =63260a(13) =125840a(14) =251692a(15) =504456a(16) =1009452a(17) =2014560a(18) =4031900a(19) =8069112a(20) =16136636a(21) =32249392a(22) =64530060a(23) =129075560a(24) =258121932a(25) =516130816a(26) =1032513532a(27) =2064979160a(28) =4129750620

External references