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A175162
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a(n) = 16*(2^n + 1).
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5
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32, 48, 80, 144, 272, 528, 1040, 2064, 4112, 8208, 16400, 32784, 65552, 131088, 262160, 524304, 1048592, 2097168, 4194320, 8388624, 16777232, 33554448, 67108880, 134217744, 268435472
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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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G.f.: 16*(2 - 3*x)/(1-x)*(1-2*x)).
E.g.f.: 16*(exp(2*x)_+ exp(x)). (End)
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MATHEMATICA
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16*(2^Range[0, 30] +1) (* or *) LinearRecurrence[{3, -2}, {32, 48}, 30] (* Harvey P. Dale, Jun 08 2017 *)
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PROG
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(Magma) I:=[32, 48]; [n le 2 select I[n] else 3*Self(n-1) - 2*Self(n-2): n in [1..41]]; // G. C. Greubel, Jul 08 2021
(Sage) [16*(2^n +1) for n in (0..40)] # G. C. Greubel, Jul 08 2021
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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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