Polyrhombs are polyforms obtained from a rhombic grid, illustrated above.
The numbers of polyrhombs with 
, 2, ... components are 1, 1, 3, 7, 20, 62, 204, ... (OEIS
A056783), the first few of which are illustrated
above.
Polyrhomb
See also
Polyform, RhombusExplore with Wolfram|Alpha
References
Clarke, A. L. "The Poly Pages." http://www.recmath.com/PolyPages/.Owen, B. "Polyforms." http://tech.groups.yahoo.com/group/polyforms/.Sloane, N. J. A. Sequence A056783 in "The On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
PolyrhombCite this as:
Weisstein, Eric W. "Polyrhomb." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Polyrhomb.html