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A002249 a(n)=a(n-1)-2*a(n-2). +0
9
2, 1, -3, -5, 1, 11, 9, -13, -31, -5, 57, 67, -47, -181, -87, 275, 449, -101, -999, -797, 1201, 2795, 393, -5197, -5983, 4411, 16377, 7555, -25199, -40309, 10089, 90707, 70529, -110885, -251943, -30173, 473713, 534059, -413367, -1481485 (list; graph; listen)
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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