A331252 Triangles with integer sides i <= j <= k sorted by area, and, in case of ties, lexicographically by side lengths (smallest first). The sequence gives middle side j. The other sides are in A331251 and A331253.

1, 2, 3, 2, 4, 2, 5, 3, 3, 6, 7, 4, 4, 3, 8, 3, 3, 9, 5, 5, 10, 4, 11, 6, 4, 6, 12, 4, 7, 13, 5, 4, 7, 4, 14, 5, 8, 5, 15, 6, 4, 8, 4, 16, 9, 5, 17, 6, 7, 9, 6, 18, 10, 5, 19, 6, 5, 5, 11, 8, 5, 10, 20, 7, 7, 21, 12, 5, 7, 11, 22, 9, 6, 6, 23, 6, 13, 8, 8, 12

Offset

1,2

Links

Table of n, a(n) for n=1..80.

Example

See A331251.

Crossrefs

Cf. A331251 (shortest side), A331253 (longest side).

Sequence in context: A323236 A319702 A365791 * A162908 A373558 A222817

Adjacent sequences: A331249 A331250 A331251 * A331253 A331254 A331255

Keyword

nonn

Author

Hugo Pfoertner, Jan 19 2020

Status

approved