Yea, I've seen that before also. I think this might be a bit induced, as I've got a bunch that are just flowering and I set this seedling off to the side of them, so they've not been getting the optimum amount of light/attention (light isn't dialed down on them hard) as I usually would, so I think it might be a little sunlight deprived. If I look real closely, the first set of leaves are tri's (which happen often for me) the second node set has 5, although 2 of them are very tiny, and it looks like the third node is trying for 7 leaves.
I've got some of the photoperiods a little on the peripheral, since there not timeline dependent.
Much of the ATF I've come across here is trifolate more than I've seen on average, plus a lot of the genetics that I got from seed king appear this way. I'm wondering if it's a northern phenomenon, caused by "overcast" lighting.