Take a good look at the week below. All the spokes cross 3 other spokes bwteen leaving the hub and meeting the rim. But there are no 3X length spokes used at all.

I have not built one of these and neither do I intend to do so.It does question the defintion of spoke length being determined by the number of spokes they cross.

A more accurate definition would be a displacment factor. Consider a radial spoke. This would have a displacment factor of 0. Now displace the spoke one hole in the rim in any direction (Ignoring holes for the other side of the wheel). This spoke would now have a displacement factor of 1 or what is currently known as 1 Cross. Displace it again and it has a displacment of 2 or 2 Cross. This definition works for all methods of wheel building and not just regular patterns.

The wheel illustrated would have uneven tension in the spokes. All the trailing spokes would have greater tension than the leading. If the wheel was built so that all the trailing spokes had less tension (4X spokes) and all the leading spokes had more tension (2X spokes). This may be advantageous for rear wheels to compensate for the affects of acceleration. However I am not an enginneer and will leave this thought with them.