[seqfan] Flattenable polyominoids

john.mason at lispa.it john.mason at lispa.it
Thu Oct 20 14:07:10 CEST 2016

Dear Seqfans
I have just submitted as draft A277565 which counts flattenable 
polyominoids. That is the number of polyominoids (polyominoes in 3 
dimensions) that, by a process of unfolding, may be transformed into a 
polyomino of the same size.
In the links you may find a pdf with drawings of flattenable (and 
unflattenable) polyominoids.

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