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A068531 a(n)=(3^(2^n)-1)/2^(n+2). +0
1
1, 5, 205, 672605, 14476720225405, 13412827423017626893194723005, 23027704253395670256876704807446325518902757016163752166205, 13575044177455540309076151053677861632247934649270423631992658635745710217750628\ 5098634540189560165548644204629442284605 (list; graph; listen)
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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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