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A054876
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Number of pairwise incongruent triangles with integer sides and positive integer area and second longest side of length n.
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0
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0, 0, 0, 1, 2, 0, 0, 1, 0, 3, 0, 2, 4, 1, 4, 1, 4, 0, 0, 6, 1, 0, 0, 3, 10, 5, 0, 4, 6, 6, 0, 1, 1, 7, 7, 2, 5, 1, 8, 10, 6, 2
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,5
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EXAMPLE
| a(10) is 3 because there are three different integer-sided, integer-area triangles with middle side length 10, namely [9,10,17], [10,10,12], and [10,10,16].
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CROSSREFS
| Sequence in context: A065293 A164615 A171912 * A109502 A112983 A158785
Adjacent sequences: A054873 A054874 A054875 * A054877 A054878 A054879
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KEYWORD
| nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), May 26 2000
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EXTENSIONS
| Definition corrected and offset changed by James Buddenhagen 16 Jan 2012
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