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 A167544 a(n) = (n-3)*(n-8)/2 . 2
 -2, -3, -3, -2, 0, 3, 7, 12, 18, 25, 33, 42, 52, 63, 75, 88, 102, 117, 133, 150, 168, 187, 207, 228, 250, 273, 297, 322, 348, 375, 403, 432, 462, 493, 525, 558, 592, 627, 663, 700, 738, 777, 817, 858, 900, 943, 987, 1032, 1078, 1125, 1173 (list; graph; refs; listen; history; text; internal format)
 OFFSET 4,1 COMMENTS Essentially a duplicate of A055998. LINKS G. C. Greubel, Table of n, a(n) for n = 4..1000 Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n) = 3*a(n-1) - 3*a(n-2) + a(n-3). G.f.: x^4*(-2+3*x)/(1-x)^3. a(n) = A055998(n-8). - Philippe Deléham, Nov 25 2009 a(n) = a(n-1) + n - 6 (with a(4)=-2). - Vincenzo Librandi, Dec 05 2010 a(n) = A027379(n-8) for n >= 9. - Georg Fischer, Oct 24 2018 MATHEMATICA Table[(n - 3)*(n - 8)/2, {n, 4, 100}] (* G. C. Greubel, Jun 15 2016 *) PROG (PARI) a(n)=(n-3)*(n-8)/2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Cf. A027379, A135929, A137276. Sequence in context: A285408 A101914 A099530 * A291196 A279316 A074989 Adjacent sequences:  A167541 A167542 A167543 * A167545 A167546 A167547 KEYWORD sign,easy,less AUTHOR Jamel Ghanouchi, Nov 06 2009 EXTENSIONS Edited and extended by R. J. Mathar, Nov 12 2009 STATUS approved

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Last modified January 22 14:24 EST 2019. Contains 319364 sequences. (Running on oeis4.)