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A107576
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a(n)=perimeter of n-th triangle listed at A107572.
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4
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9, 11, 12, 13, 13, 14, 15, 15, 15, 16, 16, 17, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 23, 23, 23, 23, 23, 23, 23, 23, 24, 24, 24, 24, 24, 24, 24, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 26, 26, 26, 26, 26, 26
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The number of perimeters equal to n+6 is A005044(n).
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EXAMPLE
| The first 5 integer-sided scalene triangles (a,b,c) with a<b<c are (2,3,4), (2,4,5), (3,4,5), (2,5,6), (3,4,6), of which the perimeters are 9,11,12,13,13.
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CROSSREFS
| Cf. A107572, A107573, A107574, A107575, A107577, A005044, A070080.
Sequence in context: A172283 A172185 A098728 * A043698 A031954 A043631
Adjacent sequences: A107573 A107574 A107575 * A107577 A107578 A107579
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu), May 16 2005
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