OFFSET
1,1
COMMENTS
The smallest perimeters corresponding to 1,2,...,13 triangles are 64, 80, 576, 2304, 14400, 9680, 129600, 57600, 451584, 230400, 921600, 518400, 705600. - Giovanni Resta, May 23 2020
LINKS
Giovanni Resta, Table of n, a(n) for n = 1..4000
Eric Weisstein's World of Mathematics, Heronian Triangle
Wikipedia, Heronian triangle
Wikipedia, Integer Triangle
EXAMPLE
64 is the perimeter of the triangle (5^2, 5^2, 14);
80 is the perimeter of the triangles (30, 5^2, 5^2) and (39, 5^2, 4^2);
90 is the perimeter of the triangles (6^2, 29, 5^2) and (40, 5^2, 5^2).
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, May 23 2020
EXTENSIONS
Terms a(10) and beyond from Giovanni Resta, May 23 2020
STATUS
approved