Number of (n+1) X 4 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

A186933

Number of (n+1) X 4 binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces.

Terms

    a(0) =40a(1) =472a(2) =1840a(3) =10496a(4) =46960a(5) =241320a(6) =1152312a(7) =5769904a(8) =28108104a(9) =138858120a(10) =680168896a(11) =3348217496a(12) =16439521504a(13) =80842220784a(14) =397185103728

External references