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 A184882 a(n)=1-4*n-4*n^2. 2
 1, -7, -23, -47, -79, -119, -167, -223, -287, -359, -439, -527, -623, -727, -839, -959, -1087, -1223, -1367, -1519, -1679, -1847, -2023, -2207, -2399, -2599, -2807, -3023, -3247, -3479, -3719, -3967, -4223, -4487, -4759, -5039, -5327, -5623 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Hankel transform of A184881. 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 G.f.: (1-10*x+x^2)/(1-x)^3. a(n)=+3*a(n-1)-3*a(n-2)+1*a(n-3) for n>=3. a(0)=1, a(n)=a(n-1)-8*n. - Vincenzo Librandi, Jan 25 2011 MATHEMATICA Table[1-4n-4n^2, {n, 0, 50}] (* or *) LinearRecurrence[{3, -3, 1}, {1, -7, -23}, 50] (* Harvey P. Dale, Feb 21 2014 *) PROG (Magma) [1-4*n-4*n^2: n in [0..60]]; // Vincenzo Librandi, Feb 23 2014 (PARI) a(n)=1-4*n-4*n^2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A139035 A002146 A336092 * A073577 A348230 A139830 Adjacent sequences: A184879 A184880 A184881 * A184883 A184884 A184885 KEYWORD sign,easy AUTHOR Paul Barry, Jan 24 2011 STATUS approved

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Last modified April 23 12:44 EDT 2024. Contains 371913 sequences. (Running on oeis4.)