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 A177769 111*n. 2
 111, 222, 333, 444, 555, 666, 777, 888, 999, 1110, 1221, 1332, 1443, 1554, 1665, 1776, 1887, 1998, 2109, 2220, 2331, 2442, 2553, 2664, 2775, 2886, 2997, 3108, 3219, 3330, 3441, 3552, 3663, 3774, 3885, 3996, 4107, 4218, 4329, 4440, 4551, 4662, 4773, 4884 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The reference contains also sequences A102807, A109344, A102794, and A109492. REFERENCES Emile Fourrey, Recreations arithmetiques, 1899 and later, Vuibert, Paris, page 11. LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..10000 Index entries for linear recurrences with constant coefficients, signature (2,-1). FORMULA G.f.: 111*x/(x-1)^2. a(n) = +2*a(n-1) -a(n-2). a(n) = a(n-1)+111. PROG (MAGMA) [111*n: n in [1..50]]; // Vincenzo Librandi, Aug 04 2011 CROSSREFS Sequence in context: A084043 A033284 A123673 * A074842 A180115 A082941 Adjacent sequences:  A177766 A177767 A177768 * A177770 A177771 A177772 KEYWORD nonn,easy,changed AUTHOR Paul Curtz, May 13 2010 STATUS approved

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