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A005359
n! if n is even otherwise 0 (from Taylor series for cos x).
+0
9
1, 0, 2, 0, 24, 0, 720, 0, 40320, 0, 3628800, 0, 479001600, 0, 87178291200, 0, 20922789888000, 0, 6402373705728000, 0, 2432902008176640000, 0, 1124000727777607680000, 0, 620448401733239439360000, 0
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Maintained by
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
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