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0, 4, 32, 108, 256, 500, 864, 1372, 2048, 2916, 4000, 5324, 6912, 8788, 10976, 13500, 16384, 19652, 23328, 27436, 32000, 37044, 42592, 48668, 55296, 62500, 70304, 78732, 87808, 97556, 108000, 119164, 131072, 143748, 157216, 171500, 186624, 202612, 219488
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| 2*a(n) = (2*n)^3 is a perfect cube.
Number of edges of the product of two complete bipartite graphs, each of order 2n, K_n,n x K_n,n - Roberto E. Martinez II (remartin(AT)fas.harvard.edu), Jan 07 2002
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..750
F. Ellermann, Illustration of binomial transforms
Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1)
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FORMULA
| G.f. 4*x*(1+4*x+x^2)/ (x-1)^4. - R. J. Mathar, Feb 01 2011
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PROG
| (MAGMA) [4*n^3: n in [0..40]]; // Vincenzo Librandi, Apr 27 2011
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CROSSREFS
| Sequence in context: A153794 A108914 A052469 * A088658 A088802 A123854
Adjacent sequences: A033427 A033428 A033429 * A033431 A033432 A033433
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KEYWORD
| nonn,easy
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AUTHOR
| Jeff Burch (jmburch(AT)osprey.smcm.edu)
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