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A084518
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Partial sums of A084519. Positions of ones in the first differences of A084516.
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2
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1, 2, 5, 18, 65, 238, 877, 3234, 11929, 44006, 162341, 598890, 2209361, 8150542, 30068125, 110924178, 409209865, 1509614198, 5569110677, 20544980154, 75792390209, 279605352286, 1031490797581, 3805267877730, 14037995932921
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OFFSET
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1,2
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LINKS
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FORMULA
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Empirical G.f.: x*(1-2*x-2*x^2)/((1-x)*(1-3*x-2*x^2-2*x^3)). [Colin Barker, Apr 17 2012]
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MATHEMATICA
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Accumulate[LinearRecurrence[{3, 2, 2}, {1, 1, 3}, 30]] (* Harvey P. Dale, Jul 20 2013 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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