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A070110 Numbers n such that [A070080(n), A070081(n), A070082(n)] is an integer triangle with relatively prime side lengths. 13
1, 2, 4, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 22, 23, 25, 27, 28, 29, 30, 32, 33, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 69, 70, 72, 73, 74, 75, 77 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

A070084(a(k)) = gcd(A070080(a(k)), A070081(a(k)), A070082(a(k))) = 1;

all integer triangles [A070080(a(k)), A070081(a(k)), A070082(a(k))] are mutually nonisomorphic.

LINKS

Table of n, a(n) for n=1..62.

R. Zumkeller, Integer-sided triangles

EXAMPLE

a(10)=13: [A070080(13), A070081(13), A070082(13)]=[2,4,5], A070084(13)=gcd(2,4,5)=1.

CROSSREFS

Cf. A051493, A070113, A070116, A070119, A070122, A070125, A070128, A070131, A070134, A070137, A070084.

Sequence in context: A190225 A276706 A271396 * A049095 A101742 A194831

Adjacent sequences:  A070107 A070108 A070109 * A070111 A070112 A070113

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 05 2002

STATUS

approved

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Last modified November 17 00:02 EST 2018. Contains 317275 sequences. (Running on oeis4.)