Polypons are polyforms obtained from dividing a regular
triangular grid into 30-30-120 triangles, illustrated above.
The numbers of polypons with 
,
2, ... components are 1, 2, 2, 4, 4, 10, 13, 29, 47, ... (OEIS A057784),
the first few of which are illustrated above.
See also
Polyform
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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 A057784 in "The
On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
Polypon
Cite this as:
Weisstein, Eric W. "Polypon." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Polypon.html
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