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 A109053 a(n) = lcm(n,12). 4
 0, 12, 12, 12, 12, 60, 12, 84, 24, 36, 60, 132, 12, 156, 84, 60, 48, 204, 36, 228, 60, 84, 132, 276, 24, 300, 156, 108, 84, 348, 60, 372, 96, 132, 204, 420, 36, 444, 228, 156, 120, 492, 84, 516, 132, 180, 276, 564, 48, 588, 300, 204, 156, 636, 108, 660, 168 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Muniru A Asiru, Table of n, a(n) for n = 0..5000 Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,-1). FORMULA a(n) = n*12/gcd(n, 12). a(n) = 12*A051724(n). - R. J. Mathar, Feb 12 2019 From Colin Barker, Mar 04 2019: (Start) G.f.: 12*x*(1 + x + x^2 + x^3 + 5*x^4 + x^5 + 7*x^6 + 2*x^7 + 3*x^8 + 5*x^9 + 11*x^10 + x^11 + 11*x^12 + 5*x^13 + 3*x^14 + 2*x^15 + 7*x^16 + x^17 + 5*x^18 + x^19 + x^20 + x^21 + x^22) / (1 - 2*x^12 + x^24). a(n) = 2*a(n-12) - a(n-24) for n>23. (End) MATHEMATICA Array[LCM[#, 12]&, 60, 0] (* Harvey P. Dale, Mar 26 2015 *) PROG (Sage) [lcm(n, 12) for n in range(0, 57)] # Zerinvary Lajos, Jun 09 2009 (GAP) List([0..60], n->Lcm(n, 12)); # Muniru A Asiru, Mar 04 2019 (PARI) concat(0, Vec(12*x*(1 + x + x^2 + x^3 + 5*x^4 + x^5 + 7*x^6 + 2*x^7 + 3*x^8 + 5*x^9 + 11*x^10 + x^11 + 11*x^12 + 5*x^13 + 3*x^14 + 2*x^15 + 7*x^16 + x^17 + 5*x^18 + x^19 + x^20 + x^21 + x^22) / (1 - 2*x^12 + x^24) + O(x^40))) \\ Colin Barker, Mar 04 2019 (PARI) for(n=0, 60, print1(lcm(n, 12), ", ")) \\ G. C. Greubel, Mar 06 2019 (MAGMA) [LCM(n, 12): n in [0..60]]; // G. C. Greubel, Mar 06 2019 CROSSREFS Cf. A051724, A109042. Sequence in context: A064162 A028996 A113595 * A186100 A334245 A134324 Adjacent sequences:  A109050 A109051 A109052 * A109054 A109055 A109056 KEYWORD nonn,easy AUTHOR Mitch Harris, Jun 18 2005 STATUS approved

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Last modified May 30 12:03 EDT 2020. Contains 334724 sequences. (Running on oeis4.)