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A007682 a(n) = - Sum (n+k)!a(k)/(2k)!, k = 0..n-1.
(Formerly M5044)
+0
1
1, -1, 1, 1, -1, -17, -107, -415, 1231, 56671, 924365, 11322001, 97495687, -78466897, -31987213451, -1073614991039, -26754505127713, -558657850929473, -9259584394031075, -70982644052430799, 3334438016903221111, 240585292388924690959, 10679411902033402697861 (list; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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