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A172325
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Floor(n*(sqrt(7)+sqrt(3))).
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1
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0, 4, 8, 13, 17, 21, 26, 30, 35, 39, 43, 48, 52, 56, 61, 65, 70, 74, 78, 83, 87, 91, 96, 100, 105, 109, 113, 118, 122, 126, 131, 135, 140, 144, 148, 153, 157, 161, 166, 170, 175, 179, 183, 188, 192, 197, 201, 205, 210, 214, 218
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OFFSET
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0,2
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COMMENTS
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Also integer part of n*4.3778021186..., where the constant is the largest root of x^4 -20*x^2 +16.
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LINKS
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MATHEMATICA
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With[{c = Sqrt[7] + Sqrt[3]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)
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PROG
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(Magma) [Floor(n*(Sqrt(7)+Sqrt(3))): n in [0..60]];
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CROSSREFS
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KEYWORD
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nonn,easy,less
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AUTHOR
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STATUS
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approved
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