OFFSET
1,1
COMMENTS
LINKS
Peter Kagey, Table of n, a(n) for n = 1..10000
EXAMPLE
For n = 2, there exists an equilateral triangle with side length sqrt(A003136(2)) = sqrt(3) and vertices on equilateral triangular array with a(2) = 4 rows:
o
* o
o o *
o * o o.
However there is no equilateral triangle of side length sqrt(3) with vertices on a smaller triangular array with three or fewer rows.
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Peter Kagey, Oct 27 2019
STATUS
approved