A047036 - OEIS

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A047036

T(n,n+1), array T as in A047030.

1, 2, 6, 20, 69, 246, 896, 3312, 12371, 46582, 176528, 672464, 2572700, 9878116, 38044450, 146911680, 568617615, 2205268306, 8567986878, 33341710740, 129932332749, 506997589626, 1980621229040, 7745660095820, 30320567651424 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`If Y is a fixed 4-subset of a 2n-set X then a(n) is the number of n-subsets of X intersecting Y - Milan R. Janjic (agnus(AT)blic.net), Oct 21 2007`
	LINKS	`Milan Janjic, Two Enumerative Functions`
	CROSSREFS	`Sequence in context: A026029 A078483 A163135 * A199248 A148478 A148479` `Adjacent sequences: A047033 A047034 A047035 * A047037 A047038 A047039`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.