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 A213807 a(n)=Sum(L(i)*L(j)*L(k), 0<=i
 0, 0, 6, 50, 295, 1450, 6706, 29790, 129900, 559680, 2395701, 10212620, 43430140, 184412740, 782337466, 3317046390, 14059122315, 59576034630, 252422169726, 1069418901650, 4530501461200, 19192481509300, 81303194179081, 344412501233400, 1458972161656920 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS This is to Lucas numbers A000032 as A213787 is to Fibonacci numbers A000045. LINKS Alois P. Heinz, Table of n, a(n) for n = 0..500 FORMULA G.f.: -(x^6-19*x^5+4*x^4+53*x^3+7*x^2-8*x-6)*x^2 / ((x-1) * (x+1) * (x^2-x-1) * (x^2+x-1)*(x^2+4*x-1)*(x^2-3*x+1)). - Alois P. Heinz, Jun 21 2012 MAPLE a:= n-> (Matrix(10, (i, j)-> `if`(i=j-1, 1, `if`(i=10,          [-1, -1, 16, -3, -51, 24, 45, -27, -8, 7][j], 0)))^(n+3).          <<-20, 1, 0, 0, 0, 6, 50, 295, 1450, 6706>>)[1, 1]: seq (a(n), n=0..30);  # Alois P. Heinz, Jun 21 2012 CROSSREFS Cf. A000032, A213787. Sequence in context: A138422 A001303 A220887 * A241781 A272469 A223816 Adjacent sequences:  A213804 A213805 A213806 * A213808 A213809 A213810 KEYWORD nonn,easy AUTHOR Jonathan Vos Post, Jun 20 2012 STATUS approved

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Last modified June 19 17:16 EDT 2019. Contains 324222 sequences. (Running on oeis4.)