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A048045
Number of nonempty subsets of {1,2,...,n} in which exactly 3/5 of the elements are <= (n+1)/3.
1
0, 0, 0, 0, 0, 0, 0, 10, 15, 21, 84, 112, 144, 360, 450, 550, 1430, 1815, 2275, 7735, 10192, 13230, 44100, 57680, 74256, 223720, 288456, 367080, 1105800, 1427850, 1824690, 5784240, 7521360, 9684840, 30936334, 40225735, 51798175
OFFSET
1,8
CROSSREFS
Shares a bisection with A047200.
Sequence in context: A013638 A075524 A048028 * A257631 A115682 A075523
KEYWORD
nonn
STATUS
approved