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A113405 G.f.: x^3/(1-2x+x^3-2x^4). +0
15
0, 0, 0, 1, 2, 4, 7, 14, 28, 57, 114, 228, 455, 910, 1820, 3641, 7282, 14564, 29127, 58254, 116508, 233017, 466034, 932068, 1864135, 3728270, 7456540, 14913081, 29826162, 59652324, 119304647, 238609294, 477218588, 954437177, 1908874354, 3817748708 (list; graph; listen)
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Last modified December 6 19:58 EST 2009. Contains 170429 sequences.


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