A331255 Triangles with integer sides i <= j <= k sorted by radius of circumcircle, and, in case of ties, lexicographically by side lengths (smallest first). The sequence gives the middle side j. The other sides are in A331254 and A331256.

1, 2, 2, 2, 3, 3, 3, 3, 4, 3, 4, 4, 4, 4, 5, 5, 4, 5, 4, 3, 5, 5, 5, 6, 4, 5, 6, 6, 5, 6, 5, 6, 4, 6, 5, 6, 7, 6, 7, 5, 6, 7, 7, 6, 7, 6, 7, 7, 6, 8, 6, 8, 5, 7, 7, 7, 8, 4, 6, 8, 7, 5, 8, 7, 8, 7, 8, 8, 7, 9, 7, 8, 9, 6, 8, 9, 7, 8, 9, 8, 9, 7, 8, 6, 6, 9, 8

Offset

1,2

Links

Table of n, a(n) for n=1..87.

Example

See A331254.

Crossrefs

Cf. A331227, A331228 (squared radius of circumcircle), A331254 (shortest side), A331256 (longest side).

Sequence in context: A131343 A089051 A364631 * A362881 A317359 A375423

Adjacent sequences: A331252 A331253 A331254 * A331256 A331257 A331258

Keyword

nonn

Author

Hugo Pfoertner, Jan 19 2020

Status

approved