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A172526
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a(n)=floor(3*n^2*(2+sqrt(3))).
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2
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11, 44, 100, 179, 279, 403, 548, 716, 906, 1119, 1354, 1612, 1892, 2194, 2519, 2866, 3235, 3627, 4041, 4478, 4937, 5418, 5922, 6448, 6997, 7568, 8161, 8777, 9415, 10076, 10759, 11464, 12192, 12942, 13715, 14510, 15327, 16167, 17029, 17913, 18820
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OFFSET
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1,1
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COMMENTS
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Approximate area of the dodecahedron of side n=(1,2,3,4,...).
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LINKS
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MATHEMATICA
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With[{c=3(2+Sqrt[3])}, Floor[c Range[50]^2]] (* Harvey P. Dale, Apr 01 2011 *)
f[n_]:=Floor[3 n^2 (2 + Sqrt[3])]; Array[f, 50, 1] (* Vincenzo Librandi, Aug 20 2014 *)
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PROG
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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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