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A014529 Largest convex area that can be tiled with n equilateral triangles whose sides are relatively prime. 1
1, 2, 3, 7, 11, 20, 36, 71, 146, 260, 495, 860, 1559, 2831, 5114 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

REFERENCES

Robert T. Wainwright, quoted by Ian Stewart, Math. Recreations, Scientific American, Jul 15 1997, p. 96.

CROSSREFS

Sequence in context: A160434 A139630 A133044 * A095015 A024367 A037078

Adjacent sequences:  A014526 A014527 A014528 * A014530 A014531 A014532

KEYWORD

nonn,hard,nice

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

EXTENSIONS

Terms n=12..15 were calculated by John W. Layman (layman(AT)math.vt.edu).

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Last modified February 17 11:46 EST 2012. Contains 206011 sequences.