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 A010695 Period 2: repeat (2,5). 6
 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2, 5, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Also decimal expansion of 25/99. Continued fraction expansion of A176052. - R. J. Mathar, Mar 08 2012 LINKS Index entries for linear recurrences with constant coefficients, signature (0,1). FORMULA a(n) = -3/2*(-1)^n + 7/2 = 5*(n mod 2) + 2*((n+1) mod 2). - Paolo P. Lava, Oct 20 2006 G.f.: (2+5*x)/((1-x)*(1+x)). - R. J. Mathar, Nov 21 2011 a(n) = 2^(1-(-1)^n) + 1. [Bruno Berselli, Dec 29 2015] From Nicolas Bělohoubek, Nov 11 2021: (Start) a(n) = 10/a(n-1). See also A010691. a(n) = 7 - a(n-1). See also A010702. (End) PROG (Maxima) makelist(if evenp(n) then 2 else 5, n, 0, 80); /* Martin Ettl, Nov 09 2012 */ (Magma) &cat [[2, 5]^^50]; // Bruno Berselli, Dec 29 2015 CROSSREFS Cf. A010674 (2^(1-(-1)^n) - 1). Cf. A010691. Sequence in context: A220342 A221676 A073054 * A021400 A059855 A082881 Adjacent sequences: A010692 A010693 A010694 * A010696 A010697 A010698 KEYWORD nonn,easy AUTHOR EXTENSIONS Edited by Bruno Berselli, Dec 29 2015 STATUS approved

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Last modified November 27 19:23 EST 2022. Contains 358406 sequences. (Running on oeis4.)