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A004936 Numerator of (binomial(2*n-2,n-1)/n!)^2. +0
1
1, 1, 1, 25, 49, 49, 121, 20449, 20449, 5909761, 17631601, 17631601, 55190041, 55190041, 55190041, 46414824481, 154341336769, 154341336769, 427538329, 585299972401, 585299972401, 983889253606081, 3438962627443561 (list; graph; listen)
OFFSET

1,4

REFERENCES

Valtr, Pavel; The probability that n random points in a triangle are in convex position. Combinatorica 16 (1996), no. 4, 567-573.

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

CROSSREFS

Sequence in context: A143278 A106632 A090093 this_sequence A062058 A069063 A064937

Adjacent sequences: A004933 A004934 A004935 this_sequence A004937 A004938 A004939

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.


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