OFFSET
1,3
COMMENTS
The enclosing circle differs from the circumcircle by limiting the radius to (longest side)/2 for obtuse triangles, i.e., those with i^2 + j^2 < k^2.
EXAMPLE
List of triangles begins:
n
| R^2
| | i .... (this sequence)
| | | j .. (A331245)
| | | | k (A331246)
| | | | |
1 1/ 3 1 1 1
2 16/15 1 2 2
3 4/ 3 2 2 2
4 9/ 4 2 2 3 obtuse
5 81/35 1 3 3
6 81/32 2 3 3
7 3/ 1 3 3 3
8 4/ 1 2 3 4 obtuse
9 81/20 3 3 4
10 256/63 1 4 4
11 64/15 2 4 4
12 256/55 3 4 4
13 16/ 3 4 4 4
14 25/ 4 2 4 5 obtuse
15 25/ 4 3 3 5 obtuse
16 25/ 4 3 4 5
17 625/99 1 5 5
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Jan 20 2020
STATUS
approved