A331228 a(n) = denominator of squared radius R^2 of the circumcircle of the n-th triangle with integer sides i <= j <= k in a list of such triangles, the list being sorted by increasing size of R. Numerators are A331227.

3, 15, 3, 7, 35, 32, 1, 20, 63, 15, 15, 55, 3, 4, 99, 96, 39, 91, 231, 11, 84, 3, 224, 143, 7, 7, 35, 5, 64, 8, 39, 119, 455, 1, 51, 255, 195, 320, 192, 96, 96, 187, 180, 95, 171, 55, 160, 3135, 399, 255, 5, 63, 3, 3, 3, 3, 247, 15, 15, 15, 15, 36, 231, 132, 55

Offset

1,1

Comments

See A331222 and A331227.

Links

Table of n, a(n) for n=1..65.

Example

See A331227.

Crossrefs

Cf. A331222, A331223, A331227.

Sequence in context: A119678 A096682 A371099 * A331697 A331225 A331223

Adjacent sequences: A331225 A331226 A331227 * A331229 A331230 A331231

Keyword

nonn,frac

Author

Hugo Pfoertner, Jan 12 2020

Status

approved