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 A167541 a(n) = -(n - 4)*(n - 5)*(n - 12)/6. 4
 2, 5, 8, 10, 10, 7, 0, -12, -30, -55, -88, -130, -182, -245, -320, -408, -510, -627, -760, -910, -1078, -1265, -1472, -1700, -1950, -2223, -2520, -2842, -3190, -3565, -3968, -4400, -4862, -5355, -5880, -6438, -7030, -7657, -8320, -9020, -9758, -10535, -11352 (list; graph; refs; listen; history; text; internal format)
 OFFSET 6,1 COMMENTS Essentially the same as A111396. The coefficient of x^(n-6) of the Polynomial B_n(x) defined in A135929. LINKS Table of n, a(n) for n=6..48. Index entries for linear recurrences with constant coefficients, signature (4, -6, 4, -1). FORMULA a(n) = 4*a(n-1) - 6*a(n-2) + 4*a(n-3) - a(n-4). G.f.: x^6*(2 - 3*x)/(x - 1)^4. a(n) = -A111396(n-12) for n > 11. - Bruno Berselli, Oct 02 2018 MATHEMATICA LinearRecurrence[{4, -6, 4, -1}, {2, 5, 8, 10}, 50] (* Harvey P. Dale, May 27 2012 *) CROSSREFS Cf. A135929, A137276. Sequence in context: A068702 A083724 A072476 * A078345 A161817 A080228 Adjacent sequences: A167538 A167539 A167540 * A167542 A167543 A167544 KEYWORD sign,easy AUTHOR Jamel Ghanouchi, Nov 06 2009 EXTENSIONS Minor edits by N. J. A. Sloane, Nov 09 2009 Definition simplified, sequence extended by R. J. Mathar, Nov 12 2009 STATUS approved

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Last modified September 8 15:58 EDT 2024. Contains 375753 sequences. (Running on oeis4.)