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A086116 Numerator of mean deviation of a symmetrical binomial distribution on n elements. 2
1, 1, 3, 3, 15, 15, 35, 35, 315, 315, 693, 693, 3003, 3003, 6435, 6435, 109395, 109395, 230945, 230945, 969969, 969969, 2028117, 2028117, 16900975, 16900975, 35102025, 35102025, 145422675, 145422675, 300540195, 300540195, 9917826435 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..33.

Eric Weisstein's World of Mathematics, Random Walk 1-Dimensional

Eric Weisstein's World of Mathematics, Binomial Distribution

MATHEMATICA

Numerator[Table[If[OddQ[n], n!!/2/(n-1)!!, (n-1)!!/2/(n-2)!! ], {n, 50}]]

CROSSREFS

Cf. A001803, A086117.

Sequence in context: A280840 A212200 A172087 * A100735 A129356 A290344

Adjacent sequences:  A086113 A086114 A086115 * A086117 A086118 A086119

KEYWORD

nonn,frac

AUTHOR

Eric W. Weisstein, Jul 10 2003

STATUS

approved

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Last modified February 17 23:47 EST 2018. Contains 299297 sequences. (Running on oeis4.)