The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A047202 Numbers that are congruent to {2, 3, 4} mod 5. 34
 2, 3, 4, 7, 8, 9, 12, 13, 14, 17, 18, 19, 22, 23, 24, 27, 28, 29, 32, 33, 34, 37, 38, 39, 42, 43, 44, 47, 48, 49, 52, 53, 54, 57, 58, 59, 62, 63, 64, 67, 68, 69, 72, 73, 74, 77, 78, 79, 82, 83, 84, 87, 88, 89, 92, 93, 94, 97, 98, 99, 102, 103, 104, 107, 108 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Stefano Spezia, Table of n, a(n) for n = 1..10000 Index entries for linear recurrences with constant coefficients, signature (1,0,1,-1). FORMULA G.f.: x*(2+x+x^2+x^3) / ((1+x+x^2)*(x-1)^2). - R. J. Mathar, Oct 07 2011 From Wesley Ivan Hurt, Jun 14 2016: (Start) a(n) = a(n-1) + a(n-3) - a(n-4) for n>3. a(n) = (15*n-3-6*cos(2*n*Pi/3)+2*sqrt(3)*sin(2*n*Pi/3))/9. a(3k) = 5k-1, a(3k-1) = 5k-2, a(3k-2) = 5k-3. (End) a(n) = 2*n - floor((n-1)/3) - ((n-1) mod 3). - Wesley Ivan Hurt, Sep 26 2017 MAPLE A047202:=n->(15*n-3-6*cos(2*n*Pi/3)+2*sqrt(3)*sin(2*n*Pi/3))/9: seq(A047202(n), n=1..100); # Wesley Ivan Hurt, Jun 14 2016 MATHEMATICA Select[Range[0, 200], MemberQ[{2, 3, 4}, Mod[#, 5]] &] (* Vladimir Joseph Stephan Orlovsky, Feb 12 2012 *) PROG (MAGMA) [n: n in [1..150] | n mod 5 in [2..4]]; // Vincenzo Librandi, Mar 31 2011 (PARI) a(n)=n\3*5+[-1, 2, 3][n%3+1] \\ Charles R Greathouse IV, Dec 22 2011 CROSSREFS Sequence in context: A061856 A105941 A276876 * A064953 A097503 A030701 Adjacent sequences:  A047199 A047200 A047201 * A047203 A047204 A047205 KEYWORD nonn,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 17 06:46 EDT 2021. Contains 343059 sequences. (Running on oeis4.)