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0, 4, 64, 324, 1024, 2500, 5184, 9604, 16384, 26244, 40000, 58564, 82944, 114244, 153664, 202500, 262144, 334084, 419904, 521284, 640000, 777924, 937024, 1119364, 1327104, 1562500, 1827904, 2125764, 2458624, 2829124, 3240000, 3694084, 4194304, 4743684, 5345344
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Nonnegative integers a(n) such that (-a(n))^(1/4) is a Gaussian integer, since (n + n*i)^4 = -4*n^4
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LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (5,-10,10,-5,1).
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FORMULA
| a(n) = 4*n^4
a(n) = A008586(A000583(n)) = A000290(A005843(A000290(n))). [Reinhard Zumkeller, Jan 25 2012]
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MATHEMATICA
| Table[4 n^4, {n, 0, 20}]
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PROG
| (Haskell)
a141046 = (* 4) . (^ 4) -- Reinhard Zumkeller, Jan 25 2012
(PARI) a(n)=4*n^4 \\ Charles R Greathouse IV, Jan 26 2012
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CROSSREFS
| Sequence in context: A056982 A110258 A030994 * A165516 A064935 A030098
Adjacent sequences: A141043 A141044 A141045 * A141047 A141048 A141049
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KEYWORD
| easy,nonn,changed
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AUTHOR
| Fredrik Johansson (fredrik.johansson(AT)gmail.com), Jul 31 2008
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