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A107574
a(n)=middle sidelength of n-th triangle listed at A107572.
4
3, 4, 4, 5, 4, 5, 6, 5, 5, 6, 5, 7, 6, 5, 6, 7, 6, 6, 8, 7, 6, 7, 6, 8, 7, 6, 7, 9, 8, 7, 8, 6, 7, 7, 9, 8, 7, 8, 7, 10, 9, 8, 9, 7, 8, 7, 8, 10, 9, 8, 9, 7, 8, 8, 11, 10, 9, 10, 8, 9, 7, 8, 9, 8, 11, 10, 9, 10, 8, 9, 8, 9, 12, 11, 10, 11, 9, 10, 8, 9, 10, 8, 9, 9, 12, 11, 10, 11, 9, 10, 8, 9, 10, 9, 13
OFFSET
1,1
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 middle sidelengths are 3,4,4,5,4.
KEYWORD
nonn
AUTHOR
Clark Kimberling, May 16 2005
STATUS
approved