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 A111989 G.f.: 1/(1-6*x+8*x^3). 2
 1, 6, 36, 208, 1200, 6912, 39808, 229248, 1320192, 7602688, 43782144, 252131328, 1451966464, 8361541632, 48152199168, 277297463296, 1596892446720, 9196137086976, 52958442815488, 304975517319168, 1756284007219200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 REFERENCES Charles Jordan, Calculus of Finite Differences, Chelsea, 1965, p. 43. See the reference to L. Euler there. LINKS Index entries for linear recurrences with constant coefficients, signature (6,0,-8). FORMULA a(n)= 6*a(n-1)-8*a(n-3), a(-2)= 0 =a(-1), a(0)=1, (or a(j)=6^j, j=0, 1, 2). CROSSREFS Cf. A111990 (first convolution), A111991 (second convolution). Sequence in context: A267468 A225685 A006812 * A064238 A014336 A268941 Adjacent sequences:  A111986 A111987 A111988 * A111990 A111991 A111992 KEYWORD nonn,easy AUTHOR Wolfdieter Lang, Sep 12 2005 STATUS approved

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