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Search: id:A070081
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A070081 Middle side of integer triangles [A070080(n)<=a(n)<=A070082(n)], sorted by perimeter, sides lexicographically ordered. +0
71
1, 2, 2, 3, 2, 3, 4, 3, 3, 4, 3, 5, 4, 3, 4, 5, 4, 4, 6, 5, 4, 5, 4, 6, 5, 4, 5, 7, 6, 5, 6, 4, 5, 5, 7, 6, 5, 6, 5, 8, 7, 6, 7, 5, 6, 5, 6, 8, 7, 6, 7, 5, 6, 6, 9, 8, 7, 8, 6, 7, 5, 6, 7, 6, 9, 8, 7, 8, 6, 7, 6, 7, 10, 9, 8, 9, 7, 8, 6, 7, 8, 6, 7, 7, 10, 9, 8, 9, 7 (list; graph; listen)
OFFSET

1,2

COMMENT

A070080(n) + a(n) + A070082(n) = A070083(n).

LINKS

R. Zumkeller, Integer-sided triangles

CROSSREFS

Cf. A070084, A070085, A070086, A055593, A069595, A069594, A069598, A046129.

Sequence in context: A002199 A104324 A131818 this_sequence A034883 A071647 A051125

Adjacent sequences: A070078 A070079 A070080 this_sequence A070082 A070083 A070084

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 05 2002

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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