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A238366
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a(n) = 5*a(n-2) + 2, a(0) = 1, a(1) = 2.
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1
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1, 2, 7, 12, 37, 62, 187, 312, 937, 1562, 4687, 7812, 23437, 39062, 117187, 195312, 585937, 976562, 2929687, 4882812, 14648437, 24414062, 73242187, 122070312, 366210937, 610351562, 1831054687, 3051757812, 9155273437, 15258789062, 45776367187, 76293945312
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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G.f.: (1+x)/((1-x)*(1-5*x^2)).
a(n) = a(n-1) + 5*a(n-2) - 5*a(n-3), a(0) = 1, a(1) = 2, a(2) = 7.
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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