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 A085432 a(n) = number of triangles ABC with side lengths (n, m, p) such that n, m, p are integers, 1 <= n <= m <= p, gcd(n, m, p) = 1, the Nagel point N of ABC lies on the incircle C(I, r). 0
 1, 1, 1, 1, 2, 1, 2, 2, 3, 2, 5, 2, 6, 3, 4, 4, 8, 3, 9, 4, 6, 5, 11, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS 3*n = m + p. LINKS EXAMPLE a(1) = 1; degenerate triangle (1, 1, 2). a(2) = 1; triangle (2, 3, 3). a(3) = 1; triangle (3, 4, 5). a(4) = 1; triangle (4, 5, 7). a(5) = 2; triangles (5, 6, 9) and (5, 7, 8). CROSSREFS Sequence in context: A241312 A075989 A304714 * A029169 A202090 A241760 Adjacent sequences:  A085429 A085430 A085431 * A085433 A085434 A085435 KEYWORD nonn,easy AUTHOR Philippe Deléham, Aug 13 2003 STATUS approved

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Last modified June 5 16:19 EDT 2020. Contains 334852 sequences. (Running on oeis4.)