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A172331
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Floor(n*(sqrt(13)+sqrt(7))).
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1
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0, 6, 12, 18, 25, 31, 37, 43, 50, 56, 62, 68, 75, 81, 87, 93, 100, 106, 112, 118, 125, 131, 137, 143, 150, 156, 162, 168, 175, 181, 187, 193, 200, 206, 212, 218, 225, 231, 237, 243, 250, 256, 262, 268, 275, 281, 287, 293, 300, 306, 312
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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*6.2513025865..., where the constant is the largest root of x^4 -40*x^2 +36.
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 0..1000
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MATHEMATICA
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With[{c = Sqrt[13] + Sqrt[7]}, Floor[c Range[0, 70]]] (* Vincenzo Librandi, Aug 01 2013 *)
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PROG
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(MAGMA) [Floor(n*(Sqrt(13)+Sqrt(7))): n in [0..60]];
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CROSSREFS
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Cf. A110117, A172323-A172332, A172334, A172336-A172338.
Sequence in context: A033003 A108592 A108593 * A038130 A246295 A108587
Adjacent sequences: A172328 A172329 A172330 * A172332 A172333 A172334
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KEYWORD
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nonn,easy,less
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AUTHOR
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Vincenzo Librandi, Feb 01 2010
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STATUS
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approved
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