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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. 2
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 (list; graph; refs; listen; history; text; internal format)
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: A272100 A119382 A166671 * A104198 A093314 A175765

Adjacent sequences:  A331255 A331256 A331257 * A331259 A331260 A331261

KEYWORD

nonn,frac

AUTHOR

Hugo Pfoertner, Jan 26 2020

STATUS

approved

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Last modified January 18 09:26 EST 2022. Contains 350454 sequences. (Running on oeis4.)