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A164094
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a(n) = 3*2^n + 2.
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4
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5, 8, 14, 26, 50, 98, 194, 386, 770, 1538, 3074, 6146, 12290, 24578, 49154, 98306, 196610, 393218, 786434, 1572866, 3145730, 6291458, 12582914, 25165826, 50331650, 100663298, 201326594, 402653186, 805306370, 1610612738, 3221225474
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OFFSET
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0,1
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LINKS
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FORMULA
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a(n) = A007283(n) + 2 = 3*a(n-1) - 2*a(n-2).
G.f.: (5-7*x)/((2*x-1)*(x-1)).
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MATHEMATICA
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PROG
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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