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A067624
Sqrt((1+cos(y))/2)= sum(n>=0,(-1)^n*y^(2n)/a(n)).
+0
4
1, 8, 384, 46080, 10321920, 3715891200, 1961990553600, 1428329123020800, 1371195958099968000, 1678343852714360832000, 2551082656125828464640000, 4714400748520531002654720000, 10409396852733332453861621760000
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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