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 A165281 a(n) = (n+1)*(6*n^4 - 51*n^3 + 161*n^2 - 251*n + 251). 3
 251, 232, 243, 224, 475, 2376, 9107, 26368, 63099, 132200, 251251, 443232, 737243, 1169224, 1782675, 2629376, 3770107, 5275368, 7226099, 9714400, 12844251, 16732232, 21508243, 27316224, 34314875, 42678376, 52597107, 64278368, 77947099 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS The sequence is the numerators of the fifth column of the array on page 56 of the reference. The denominators are A091137(4)=720. The sequence is the binomial transform of the quasi-finite 251, -19, 30, -60, 360, 720, 0, 0, 0, 0, ... The fifth differences are (constant) 720; the fourth differences are 720*n + 360. REFERENCES P. Curtz, Integration numerique des systemes differentiels a conditions initiales, C.C.S.A., Arcueil, 1969. LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..10000 Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1). FORMULA a(n) mod 10 = A010879(n+1). a(n+1) - a(n) = A157411(n). a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6). G.f.: ( 251 - 1274*x + 2616*x^2 - 2774*x^3 + 1901*x^4 ) / (x-1)^6. - R. J. Mathar, Jul 06 2011 MATHEMATICA Table[(n+1)(6n^4-51n^3+161n^2-251n+251), {n, 0, 30}] (* or *) LinearRecurrence[{6, -15, 20, -15, 6, -1}, {251, 232, 243, 224, 475, 2376}, 30] (* Harvey P. Dale, Aug 20 2014 *) PROG (Magma) [(n+1)*(6*n^4-51*n^3+161*n^2-251*n+251): n in [0..30]]; // Vincenzo Librandi, Aug 07 2011 CROSSREFS Cf. A157371, A152064. Sequence in context: A267972 A267995 A201547 * A033449 A271581 A142419 Adjacent sequences: A165278 A165279 A165280 * A165282 A165283 A165284 KEYWORD nonn,easy AUTHOR Paul Curtz, Sep 13 2009 STATUS approved

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Last modified May 25 09:23 EDT 2024. Contains 372786 sequences. (Running on oeis4.)