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A082840 a(n)=4a(n-1)-a(n-2)+3. +0
4
-1, 1, 8, 34, 131, 493, 1844, 6886, 25703, 95929, 358016, 1336138, 4986539, 18610021, 69453548, 259204174, 967363151, 3610248433, 13473630584, 50284273906, 187663465043, 700369586269, 2613814880036, 9754889933878, 36405744855479, 135868089488041 (list; graph; listen)
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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