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 A174333 61*n^2. 1
 0, 61, 244, 549, 976, 1525, 2196, 2989, 3904, 4941, 6100, 7381, 8784, 10309, 11956, 13725, 15616, 17629, 19764, 22021, 24400, 26901, 29524, 32269, 35136, 38125, 41236, 44469, 47824, 51301, 54900, 58621, 62464, 66429, 70516, 74725, 79056 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = (31*n)^2-(30*n)^2. a(n) = 3*a(n-1) -3*a(n-2) +a(n-3). - Vincenzo Librandi, Jul 12 2012 G.f.: 61*x*(1+x)/(1-x)^3. - Vincenzo Librandi, Jul 12 2012 MATHEMATICA Table[61*n^2, {n, 0, 50}] (* Vincenzo Librandi, Jul 12 2012 *) PROG (MAGMA) [61*n^2: n in [0..50]]; (PARI) a(n)=61*n^2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A034863 A251312 A158673 * A158680 A152413 A029815 Adjacent sequences:  A174330 A174331 A174332 * A174334 A174335 A174336 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Mar 16 2010 EXTENSIONS Definition clarified by R. J. Mathar, Jul 06 2010 Comment rewritten as formula by Bruno Berselli, Jul 12 2012 STATUS approved

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Last modified August 3 12:51 EDT 2021. Contains 346438 sequences. (Running on oeis4.)