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A048036 Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-3)/3. +0
1
0, 0, 0, 0, 0, 1, 6, 21, 42, 112, 252, 378, 759, 1419, 1914, 3564, 6864, 9295, 20020, 45055, 63083, 146648, 331568, 456484, 1007454, 2156994, 2896664, 6165494, 13079094, 17441739, 37871064, 82898739, 111029050, 247813500 (list; graph; listen)
OFFSET

1,7
CROSSREFS

Sequence in context: A031094 A007339 A056237 this_sequence A119868 A081266 A087863

Adjacent sequences: A048033 A048034 A048035 this_sequence A048037 A048038 A048039

KEYWORD

nonn

AUTHOR

Clark Kimberling (ck6(AT)evansville.edu)

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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