OFFSET

1,2

COMMENTS

In other words, the number of equilateral triangular tilings of an equilateral triangle, where rotations and reflections are considered distinct.

MAPLE

a(3)=5 because of:

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CROSSREFS

KEYWORD

nonn,more

AUTHOR

Craig Knecht and John Mason, Nov 28 2022

EXTENSIONS

a(10)-a(14) from Walter Trump, Dec 03 2022

STATUS

approved