A331258 Denominator of squared radius of inscribed circle of the n-th triangle with integer sides in the list given by A316841. Numerators are A331257.

12, 20, 3, 28, 28, 2, 4, 12, 5, 36, 5, 44, 3, 44, 44, 1, 52, 44, 3, 52, 7, 12, 52, 7, 52, 7, 4, 4, 52, 7, 20, 1, 68, 1, 60, 4, 2, 68, 20, 4, 68, 3, 76, 60, 4, 68, 9, 76, 5, 12, 68, 9, 68, 3, 76, 5, 68, 3, 76, 1, 4, 11, 68, 9, 76, 5, 84, 11, 92, 3, 76, 76, 1

Offset

1,1

Links

Table of n, a(n) for n=1..73.

Example

See A331257.

Prog

(PARI) rh2(a, b, c)={my(s=(a+b+c)/2); (s-a)*(s-b)*(s-c)/s};
for(i=1, 8, for(j=1, i, for(k=1, j, if(j+k>i, print1(denominator(rh2(i, j, k)), ", ")))))

Crossrefs

Cf. A316841, A316843, A316844, A316845, A331257.

Sequence in context: A119382 A166671 A357211 * A104198 A360529 A093314

Adjacent sequences: A331255 A331256 A331257 * A331259 A331260 A331261

Keyword

nonn,frac

Author

Hugo Pfoertner, Jan 26 2020

Status

approved